diff --git a/sources/queued/include/queued/Queued.h b/sources/queued/include/queued/Queued.h
index 8098e94..d365872 100644
--- a/sources/queued/include/queued/Queued.h
+++ b/sources/queued/include/queued/Queued.h
@@ -24,11 +24,15 @@
 #ifndef QUEUED_H
 #define QUEUED_H
 
+#include "QueuedAdvancedSettings.h"
+#include "QueuedConfiguration.h"
 #include "QueuedDatabase.h"
 #include "QueuedDebug.h"
 #include "QueuedEnums.h"
 #include "QueuedProcess.h"
 #include "QueuedProcessManager.h"
+#include "QueuedSettings.h"
+#include "QueuedTokenManager.h"
 #include "QueuedUser.h"
 
 #endif /* QUEUED_H */
diff --git a/sources/queued/include/queued/QueuedAdvancedSettings.h b/sources/queued/include/queued/QueuedAdvancedSettings.h
new file mode 100644
index 0000000..e5b2e0e
--- /dev/null
+++ b/sources/queued/include/queued/QueuedAdvancedSettings.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2016 Evgeniy Alekseev
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ *
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ */
+/**
+ * @file QueuedAdvancedSettings.h
+ * Header of Queued library
+ * @author Evgeniy Alekseev
+ * @copyright MIT
+ * @bug https://github.com/arcan1s/queued/issues
+ */
+
+
+#ifndef QUEUEDADVANCEDSETTINGS_H
+#define QUEUEDADVANCEDSETTINGS_H
+
+#include <QObject>
+
+#include "QueuedConfiguration.h"
+
+
+/**
+ * @brief implementation over database stored settings
+ */
+class QueuedAdvancedSettings : public QObject
+{
+    Q_OBJECT
+
+public:
+    /**
+     * @brief QueuedAdvancedSettings class constructor
+     * @param parent         pointer to parent item
+     */
+    explicit QueuedAdvancedSettings(QObject *parent);
+    /**
+     * @brief QueuedAdvancedSettings class destructor
+     */
+    virtual ~QueuedAdvancedSettings();
+    /**
+     * @brief upload configuration from database in to internal format
+     * @param _value         configuration values from database
+     */
+    void setValues(const QList<QVariantHash> &_values);
+
+private:
+};
+
+
+#endif /* QUEUEDADVANCEDSETTINGS_H */
diff --git a/sources/queued/include/queued/QueuedConfiguration.h b/sources/queued/include/queued/QueuedConfiguration.h
new file mode 100644
index 0000000..87ea9c5
--- /dev/null
+++ b/sources/queued/include/queued/QueuedConfiguration.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2016 Evgeniy Alekseev
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ *
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ */
+/**
+ * @file QueuedCOnfiguration.h
+ * Header of Queued library
+ * @author Evgeniy Alekseev
+ * @copyright MIT
+ * @bug https://github.com/arcan1s/queued/issues
+ */
+
+
+#ifndef QUEUEDCONFIGURATION_H
+#define QUEUEDCONFIGURATION_H
+
+#include <QString>
+
+
+/**
+ * @defgroup QueuedCfg
+ * @brief Queued configuration related types
+ */
+namespace QueuedCfg
+{
+/**
+ * @ingroup QueuedCfg
+ * @struct QueuedAdminSetup
+ * @brief structure to define administrator user
+ * @var name
+ * administrator user name
+ * @var password
+ * administrator user password
+ */
+typedef struct {
+    QString name;
+    QString password;
+} QueuedAdminSetup;
+/**
+ * m@ingroup QueuedCfg
+ * @struct QueuedDBSetup
+ * @brief structure to define database setup
+ * @var driver
+ * driver name
+ * @var hostname
+ * hostname to connect
+ * @var password
+ * password to connect if any
+ * @var path
+ * path to database
+ * @var port
+ * port to connect
+ * @var username
+ * username to connect if any
+ */
+typedef struct {
+    QString driver;
+    QString hostname;
+    QString password;
+    QString path;
+    int port;
+    QString username;
+} QueuedDBSetup;
+};
+
+
+#endif /* QUEUEDCONFIGURATION_H */
diff --git a/sources/queued/include/queued/QueuedDatabase.h b/sources/queued/include/queued/QueuedDatabase.h
index 676b2a1..fa97063 100644
--- a/sources/queued/include/queued/QueuedDatabase.h
+++ b/sources/queued/include/queued/QueuedDatabase.h
@@ -54,9 +54,9 @@ public:
      * @brief add record to database
      * @param _table         table name
      * @param _value         value to insert
-     * @return true on success
+     * @return index of inserted record or -1 if no insertion
      */
-    bool add(const QString &_table, const QVariantHash &_value);
+    long long add(const QString &_table, const QVariantHash &_value);
     /**
      * @brief check and create database
      */
@@ -132,6 +132,12 @@ private:
      */
     QHash<QString, int> getColumnsInRecord(const QStringList &_columns,
                                            const QSqlRecord &_record) const;
+    /**
+     * @brief last insertion ID
+     * @param _table         table name
+     * @return last insertion id from table
+     */
+    long long lastInsertionId(const QString &_table) const;
     /**
      * @brief additional function to get payload for query
      * @param _table         table name for search
@@ -142,4 +148,5 @@ private:
     getQueryPayload(const QString &_table, const QVariantHash &_value) const;
 };
 
+
 #endif /* QUEUEDDATABASE_H */
diff --git a/sources/queued/include/queued/QueuedDatabaseSchema.h b/sources/queued/include/queued/QueuedDatabaseSchema.h
index 111e07b..4cc921d 100644
--- a/sources/queued/include/queued/QueuedDatabaseSchema.h
+++ b/sources/queued/include/queued/QueuedDatabaseSchema.h
@@ -28,27 +28,6 @@
 #include <QVariant>
 
 
-/**
- * @struct QueuedDBField
- * @brief describes database column
- * @var name
- * column name
- * @var sqlDescription
- * description to create column
- * @var type
- * Qt type of column for cast
- */
-typedef struct {
-    QString name;
-    QString sqlDescription;
-    QVariant::Type type;
-} QueuedDBField;
-/**
- * @typedef QueuedDBSchema
- * custom map for database schemas descriptions
- */
-typedef QHash<QString, QHash<QString, QueuedDBField>> QueuedDBSchema;
-
 /**
  * @defgroup QueuedDB
  * @brief Queued database related constants
@@ -56,9 +35,53 @@ typedef QHash<QString, QHash<QString, QueuedDBField>> QueuedDBSchema;
 namespace QueuedDB
 {
 /**
+ *@ingroup QueuedDB
+* @struct QueuedDBField
+* @brief describes database column
+* @var name
+* column name
+* @var sqlDescription
+* description to create column
+* @var type
+* Qt type of column for cast
+*/
+typedef struct {
+    QString name;
+    QString sqlDescription;
+    QVariant::Type type;
+} QueuedDBField;
+/**
+ * @ingroup QueuedDB
+ * @typedef QueuedDBSchema
+ * custom map for database schemas descriptions
+ */
+typedef QHash<QString, QHash<QString, QueuedDBField>> QueuedDBSchema;
+/**
+ * @ingroup QueuedDB
  * @brief database schema
  */
 const QueuedDBSchema DBSchema = {
+    {"settings",
+     {{"_id",
+       {"_id", "INTEGER PRIMARY KEY AUTOINCREMENT UNIQUE", QVariant::LongLong}},
+      {"key", {"key", "TEXT NOT NULL DEFAULT '0'", QVariant::String}},
+      {"value", {"value", "TEXT", QVariant::String}}}},
+    {"tasks",
+     {{"_id",
+       {"_id", "INTEGER PRIMARY KEY AUTOINCREMENT UNIQUE", QVariant::LongLong}},
+      {"userId", {"userId", "INT NOT NULL DEFAULT 0", QVariant::LongLong}},
+      {"command", {"command", "TEXT", QVariant::String}},
+      {"arguments", {"arguments", "TEXT", QVariant::String}},
+      {"workDirectory", {"workDirectory", "TEXT", QVariant::String}},
+      {"nice", {"nice", "INT", QVariant::UInt}},
+      {"startTime", {"startTime", "INT", QVariant::LongLong}},
+      {"endTime", {"endTime", "INT", QVariant::LongLong}}}},
+    {"tokens",
+     {{"_id",
+       {"_id", "INTEGER PRIMARY KEY AUTOINCREMENT UNIQUE", QVariant::LongLong}},
+      {"token", {"token", "TEXT NOT NULL DEFAULT '0'", QVariant::String}},
+      {"validUntil",
+       {"validUntil", "TEXT NOT NULL DEFAULT '0'", QVariant::String}}}},
     {"users",
      {{"_id",
        {"_id", "INTEGER PRIMARY KEY AUTOINCREMENT UNIQUE", QVariant::LongLong}},
@@ -70,17 +93,7 @@ const QueuedDBSchema DBSchema = {
       {"memory", {"memory", "INT", QVariant::LongLong}},
       {"gpumemory", {"gpumemory", "INT", QVariant::LongLong}},
       {"storage", {"storage", "INT", QVariant::LongLong}},
-      {"permissions", {"permissions", "INT", QVariant::UInt}}}},
-    {"tasks",
-     {{"_id",
-       {"_id", "INTEGER PRIMARY KEY AUTOINCREMENT UNIQUE", QVariant::LongLong}},
-      {"userId", {"userId", "INT NOT NULL DEFAULT 0", QVariant::LongLong}},
-      {"command", {"command", "TEXT", QVariant::String}},
-      {"arguments", {"arguments", "TEXT", QVariant::String}},
-      {"workDirectory", {"workDirectory", "TEXT", QVariant::String}},
-      {"nice", {"nice", "INT", QVariant::UInt}},
-      {"startTime", {"startTime", "INT", QVariant::LongLong}},
-      {"endTime", {"endTime", "INT", QVariant::LongLong}}}}};
+      {"permissions", {"permissions", "INT", QVariant::UInt}}}}};
 };
 
 #endif /* QUEUEDDATABASESCHEMA_H */
diff --git a/sources/queued/include/queued/QueuedDebug.h b/sources/queued/include/queued/QueuedDebug.h
index 8cd3836..ddbfc42 100644
--- a/sources/queued/include/queued/QueuedDebug.h
+++ b/sources/queued/include/queued/QueuedDebug.h
@@ -55,6 +55,7 @@ Q_DECLARE_LOGGING_CATEGORY(LOG_SERV)
 namespace QueuedDebug
 {
 /**
+ * @ingroup QueuedDebug
  * @brief default log format
  */
 const char LOG_FORMAT[] = "[%{time "
@@ -64,6 +65,7 @@ const char LOG_FORMAT[] = "[%{time "
                           "%{message}";
 
 /**
+ * @ingroup QueuedDebug
  * @brief additional method to get build details declared in version.h
  */
 QStringList getBuildData();
diff --git a/sources/queued/include/queued/QueuedEnums.h b/sources/queued/include/queued/QueuedEnums.h
index ec83c72..3327071 100644
--- a/sources/queued/include/queued/QueuedEnums.h
+++ b/sources/queued/include/queued/QueuedEnums.h
@@ -32,6 +32,7 @@
 namespace QueuedEnums
 {
 /**
+ * @ingroup QueuedEnums
  * @enum LimitType
  * @brief available limit types
  * @var LimitType::CPUThreads
@@ -54,9 +55,8 @@ enum LimitType {
 };
 Q_DECLARE_FLAGS(LimitTypes, LimitType)
 Q_DECLARE_OPERATORS_FOR_FLAGS(LimitTypes)
-
-
 /**
+ * @ingroup QueuedEnums
  * @enum Permissions
  * @brief available user permissions
  * @var Permissions::Admin
diff --git a/sources/queued/include/queued/QueuedProcess.h b/sources/queued/include/queued/QueuedProcess.h
index d139075..f1dbedf 100644
--- a/sources/queued/include/queued/QueuedProcess.h
+++ b/sources/queued/include/queued/QueuedProcess.h
@@ -30,29 +30,6 @@
 #include "QueuedEnums.h"
 
 
-/**
- * @struct QueuedProcessDefinition
- * @brief structure to define process
- * @var cmd
- * command line
- * @var args
- * command line arguments
- * @var workingDirectory
- * path to working directory
- * @var uid
- * UID of process
- * @var gid
- * GID of process
- */
-typedef struct {
-    QString cmd;
-    QStringList args;
-    QString workingDirectory;
-    unsigned int uid;
-    unsigned int gid;
-} QueuedProcessDefinitions;
-
-
 /**
  * @brief implementation over QProcess to run processes
  */
@@ -63,6 +40,28 @@ class QueuedProcess : public QProcess
     Q_PROPERTY(QString name READ name)
 
 public:
+    /**
+     * @struct QueuedProcessDefinition
+     * @brief structure to define process
+     * @var cmd
+     * command line
+     * @var args
+     * command line arguments
+     * @var workingDirectory
+     * path to working directory
+     * @var uid
+     * UID of process
+     * @var gid
+     * GID of process
+     */
+    typedef struct {
+        QString cmd;
+        QStringList args;
+        QString workingDirectory;
+        unsigned int uid;
+        unsigned int gid;
+    } QueuedProcessDefinitions;
+
     /**
      * @brief QueuedProcess class constructor
      * @param parent         pointer to parent item
@@ -129,14 +128,15 @@ private:
     /**
      * @brief limits array
      */
-    QMap<QueuedEnums::LimitType, long long> m_limits;
+    QHash<QueuedEnums::LimitType, long long> m_limits;
     /**
      * @brief convert QString memory value to integer
      * @param _value         value to convert
-     * @param _status        convertion status
+     * @param _status        conversion status
      * @return converted integer
      */
-    long long convertMemory(QString _value, bool &_status) const;
+    long long convertMemory(QString _value, bool *_status) const;
 };
 
+
 #endif /* QUEUEDPROCESS_H */
diff --git a/sources/queued/include/queued/QueuedProcessManager.h b/sources/queued/include/queued/QueuedProcessManager.h
index 7e8a2ee..e3ff4f5 100644
--- a/sources/queued/include/queued/QueuedProcessManager.h
+++ b/sources/queued/include/queued/QueuedProcessManager.h
@@ -31,17 +31,6 @@
 #include "QueuedProcess.h"
 
 
-/**
- * @typedef QueuedProcessMap
- * map of indices to QueuedProcess pointers
- */
-typedef QHash<long long, QueuedProcess *> QueuedProcessMap;
-/**
- * @typedef QueuedProcessConnectionMap
- * map of indices to related QMetaObject::Connection
- */
-typedef QHash<long long, QMetaObject::Connection> QueuedProcessConnectionMap;
-
 /**
  * @brief implementation over QProcess to run processes
  */
@@ -52,6 +41,18 @@ class QueuedProcessManager : public QObject
 
 public:
     /**
+ * @typedef QueuedProcessMap
+ * map of indices to QueuedProcess pointers
+ */
+    typedef QHash<long long, QueuedProcess *> QueuedProcessMap;
+    /**
+     * @typedef QueuedProcessConnectionMap
+     * map of indices to related QMetaObject::Connection
+     */
+    typedef QHash<long long, QMetaObject::Connection>
+        QueuedProcessConnectionMap;
+
+    /**
      * @enum OnExitAction
      * @brief action with child process on destruction
      * @var OnExitAction::Terminate
@@ -77,8 +78,9 @@ public:
      * @param _definitions   process definitions
      * @return pointer to created task
      */
-    QueuedProcess *add(const long long _index,
-                       const QueuedProcessDefinitions _definitions);
+    QueuedProcess *
+    add(const long long _index,
+        const QueuedProcess::QueuedProcessDefinitions _definitions);
     /**
      * @brief default action on exit
      * @return default action from possible ones
@@ -146,4 +148,5 @@ private:
     QueuedProcessMap m_processes;
 };
 
+
 #endif /* QUEUEDPROCESS_H */
diff --git a/sources/queued/include/queued/QueuedSettings.h b/sources/queued/include/queued/QueuedSettings.h
new file mode 100644
index 0000000..30a0063
--- /dev/null
+++ b/sources/queued/include/queued/QueuedSettings.h
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2016 Evgeniy Alekseev
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ *
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ */
+/**
+ * @file QueuedSettings.h
+ * Header of Queued library
+ * @author Evgeniy Alekseev
+ * @copyright MIT
+ * @bug https://github.com/arcan1s/queued/issues
+ */
+
+
+#ifndef QUEUEDSETTINGS_H
+#define QUEUEDSETTINGS_H
+
+#include <QObject>
+
+#include "QueuedConfiguration.h"
+
+
+/**
+ * @brief implementation over QSettings
+ */
+class QueuedSettings : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(QString path READ path)
+    Q_PROPERTY(QueuedCfg::QueuedAdminSetup admin READ admin)
+    Q_PROPERTY(QueuedCfg::QueuedDBSetup db READ db)
+
+public:
+    /**
+     * @brief QueuedSettings class constructor
+     * @param parent         pointer to parent item
+     * @param path           path to configuration file
+     */
+    explicit QueuedSettings(QObject *parent, const QString path);
+    /**
+     * @brief QueuedSettings class destructor
+     */
+    virtual ~QueuedSettings();
+    /**
+     * @brief administrator settings
+     * @return QueuedAdminSetup structure
+     */
+    QueuedCfg::QueuedAdminSetup admin() const;
+    /**
+     * @brief database settings
+     * @return QueuedDBSetup structure
+     */
+    QueuedCfg::QueuedDBSetup db() const;
+    /**
+     * @brief default path to configuration
+     * @return default path to configuration file
+     */
+    static QString defaultPath();
+    /**
+     * @brief path to database
+     * @return path to used database
+     */
+    QString path() const;
+
+public slots:
+    /**
+     * @brief read configuration from file
+     */
+    void readConfiguration();
+
+private:
+    /**
+     * @brief admin configuration
+     */
+    QueuedCfg::QueuedAdminSetup m_cfgAdmin;
+    /**
+     * @brief database configuration
+     */
+    QueuedCfg::QueuedDBSetup m_cfgDB;
+    /**
+     * @brief path to configuration
+     */
+    QString m_path;
+};
+
+
+#endif /* QUEUEDSETTINGS_H */
diff --git a/sources/queued/include/queued/QueuedTokenManager.h b/sources/queued/include/queued/QueuedTokenManager.h
new file mode 100644
index 0000000..b244489
--- /dev/null
+++ b/sources/queued/include/queued/QueuedTokenManager.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2016 Evgeniy Alekseev
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ *
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ */
+/**
+ * @file QueuedTokenManager.h
+ * Header of Queued library
+ * @author Evgeniy Alekseev
+ * @copyright MIT
+ * @bug https://github.com/arcan1s/queued/issues
+ */
+
+
+#ifndef QUEUEDTOKENMANAGER_H
+#define QUEUEDTOKENMANAGER_H
+
+#include <QDateTime>
+#include <QObject>
+
+
+/**
+ * @brief token management system
+ */
+class QueuedTokenManager : public QObject
+{
+    Q_OBJECT
+
+public:
+    /**
+     * @brief QueuedTokenManager class constructor
+     * @param parent         pointer to parent item
+     */
+    explicit QueuedTokenManager(QObject *parent);
+    /**
+     * @brief QueuedTokenManager class destructor
+     */
+    virtual ~QueuedTokenManager();
+    /**
+     * @brief check if token is valid
+     * @param _token         token ID
+     * @return true if token is valid otherwise return false
+     */
+    bool isTokenValid(const QString &_token);
+    /**
+     * @brief register new token
+     * @param _validUntil    token valid until
+     * @return new generated token
+     */
+    QString registerToken(const QDateTime _validUntil);
+    /**
+     * @brief upload tokens from database
+     * @param _value         tokens from database
+     */
+    void setValues(const QList<QVariantHash> &_values);
+
+public slots:
+    /**
+     * @brief method which will be called on token expiring
+     * @param _token         expired token ID
+     */
+    void expireToken(const QString &_token);
+
+signals:
+    /**
+     * @brief signal which will be emitted on token expiration
+     * @param _token         token ID
+     */
+    void tokenExpired(const QString &_token);
+    /**
+     * @brief signal which will be emitted on newly created token
+     * @param _token         token ID
+     * @param _validUntil    token valid until
+     */
+    void tokenRegistered(const QString &_token, const QDateTime &_validUntil);
+
+private:
+    /**
+     * @brief token storage
+     */
+    QHash<QString, QDateTime> m_tokens;
+};
+
+
+#endif /* QUEUEDTOKENMANAGER_H */
diff --git a/sources/queued/include/queued/QueuedUser.h b/sources/queued/include/queued/QueuedUser.h
index d4e3876..8632019 100644
--- a/sources/queued/include/queued/QueuedUser.h
+++ b/sources/queued/include/queued/QueuedUser.h
@@ -30,41 +30,6 @@
 #include "QueuedEnums.h"
 
 
-/**
- * @struct QueuedUserDefinition
- * @brief structure to define user
- * @var name
- * user name
- * @var email
- * user email
- * @var passwordSHA512
- * password hash, may be empty
- * @var permissions
- * user permissions
- * @var cpuLimit
- * user limit by CPU
- * @var gpuLimit
- * user limit by GPU
- * @var memoryLimit
- * user limit by memory
- * @var gpumemoryLimit
- * user limit by GPU memory
- * @var storageLimit
- * user limit by storage
- */
-typedef struct {
-    QString name;
-    QString email;
-    QString passwordSHA512;
-    unsigned int permissions;
-    long long cpuLimit;
-    long long gpuLimit;
-    long long memoryLimit;
-    long long gpumemoryLimit;
-    long long storageLimit;
-} QueuedUserDefinitions;
-
-
 /**
  * @brief representation of user in queued
  */
@@ -92,6 +57,40 @@ class QueuedUser : public QObject
                    NOTIFY userUpdated)
 
 public:
+    /**
+     * @struct QueuedUserDefinition
+     * @brief structure to define user
+     * @var name
+     * user name
+     * @var email
+     * user email
+     * @var passwordSHA512
+     * password hash, may be empty
+     * @var permissions
+     * user permissions
+     * @var cpuLimit
+     * user limit by CPU
+     * @var gpuLimit
+     * user limit by GPU
+     * @var memoryLimit
+     * user limit by memory
+     * @var gpumemoryLimit
+     * user limit by GPU memory
+     * @var storageLimit
+     * user limit by storage
+     */
+    typedef struct {
+        QString name;
+        QString email;
+        QString passwordSHA512;
+        unsigned int permissions;
+        long long cpuLimit;
+        long long gpuLimit;
+        long long memoryLimit;
+        long long gpumemoryLimit;
+        long long storageLimit;
+    } QueuedUserDefinitions;
+
     /**
      * @brief QueuedUser class constructor
      * @param parent         pointer to parent item
diff --git a/sources/queued/src/QueuedAdvancedSettings.cpp b/sources/queued/src/QueuedAdvancedSettings.cpp
new file mode 100644
index 0000000..c1b289b
--- /dev/null
+++ b/sources/queued/src/QueuedAdvancedSettings.cpp
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2016 Evgeniy Alekseev
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ *
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ */
+/**
+ * @file QueuedAdvancedSettings.cpp
+ * Source code of queued library
+ * @author Evgeniy Alekseev
+ * @copyright GPLv3
+ * @bug https://github.com/arcan1s/queued/issues
+ */
+
+
+#include "queued/Queued.h"
+
+
+/**
+ * @class QueuedAdvancedSettings
+ */
+/**
+ * @fn QueuedAdvancedSettings
+ */
+QueuedAdvancedSettings::QueuedAdvancedSettings(QObject *parent)
+    : QObject(parent)
+{
+    qCDebug(LOG_LIB) << __PRETTY_FUNCTION__;
+}
+
+
+/**
+ * @fn ~QueuedAdvancedSettings
+ */
+QueuedAdvancedSettings::~QueuedAdvancedSettings()
+{
+    qCDebug(LOG_LIB) << __PRETTY_FUNCTION__;
+}
+
+
+/**
+ * @fn setValues
+ */
+void QueuedAdvancedSettings::setValues(const QList<QVariantHash> &_values)
+{
+    qCDebug(LOG_LIB) << "Set values from" << _values;
+}
diff --git a/sources/queued/src/QueuedDatabase.cpp b/sources/queued/src/QueuedDatabase.cpp
index 131a5b7..7c714a9 100644
--- a/sources/queued/src/QueuedDatabase.cpp
+++ b/sources/queued/src/QueuedDatabase.cpp
@@ -58,7 +58,7 @@ QueuedDatabase::~QueuedDatabase()
 /**
  * @fn add
  */
-bool QueuedDatabase::add(const QString &_table, const QVariantHash &_value)
+long long QueuedDatabase::add(const QString &_table, const QVariantHash &_value)
 {
     qCDebug(LOG_LIB) << "Add record" << _value << "to table" << _table;
 
@@ -73,10 +73,10 @@ bool QueuedDatabase::add(const QString &_table, const QVariantHash &_value)
     if (error.isValid()) {
         qCCritical(LOG_LIB) << "Could not add record" << _value << "to table"
                             << _table << "message" << error.text();
-        return false;
+        return -1;
     }
 
-    return true;
+    return lastInsertionId(_table);
 }
 
 
@@ -269,7 +269,7 @@ void QueuedDatabase::createSchema(const QString &_table)
     for (auto &column : schemaColumns) {
         if (columns.contains(column))
             continue;
-        QueuedDBField field = QueuedDB::DBSchema[_table][column];
+        QueuedDB::QueuedDBField field = QueuedDB::DBSchema[_table][column];
         QSqlQuery query
             = m_database.exec(QString("ALTER TABLE '%1' ADD `%2` %3")
                                   .arg(_table)
@@ -319,6 +319,29 @@ QueuedDatabase::getColumnsInRecord(const QStringList &_columns,
 }
 
 
+/**
+ * @fn lastInsertionId
+ */
+long long QueuedDatabase::lastInsertionId(const QString &_table) const
+{
+    qCDebug(LOG_LIB) << "Get last row ID from" << _table;
+
+    QSqlQuery query
+        = m_database.exec(QString("SELECT max(_id) FROM '%1'").arg(_table));
+    QSqlError error = query.lastError();
+    if (error.isValid()) {
+        qCCritical(LOG_LIB) << "Could not get last insertion ID";
+        return -1;
+    }
+
+    long long id;
+    while (query.next())
+        id = query.value(0).toLongLong();
+
+    return id;
+}
+
+
 /**
  * @fn getQueryPayload
  */
diff --git a/sources/queued/src/QueuedProcess.cpp b/sources/queued/src/QueuedProcess.cpp
index 8a3d4f2..ef208f6 100644
--- a/sources/queued/src/QueuedProcess.cpp
+++ b/sources/queued/src/QueuedProcess.cpp
@@ -99,7 +99,7 @@ void QueuedProcess::setLimit(const QueuedEnums::LimitType _limitType,
 
     bool status = false;
     long long intValue = _value.type() == QVariant::String
-                             ? convertMemory(_value.toString(), status)
+                             ? convertMemory(_value.toString(), &status)
                              : _value.toLongLong(&status);
 
     if (!status)
@@ -141,21 +141,21 @@ void QueuedProcess::run()
 /**
  * @fn convertMemory
  */
-long long QueuedProcess::convertMemory(QString _value, bool &_status) const
+long long QueuedProcess::convertMemory(QString _value, bool *_status) const
 {
     qCDebug(LOG_LIB) << "Convert memory value" << _value;
 
     long long intValue;
     if (_value.endsWith(QString("K")))
-        intValue = _value.remove(QString("K")).toLongLong(&_status) * 1024;
+        intValue = _value.remove(QString("K")).toLongLong(_status) * 1024;
     else if (_value.endsWith(QString("M")))
         intValue
-            = _value.remove(QString("M")).toLongLong(&_status) * 1024 * 1024;
+            = _value.remove(QString("M")).toLongLong(_status) * 1024 * 1024;
     else if (_value.endsWith(QString("G")))
-        intValue = _value.remove(QString("G")).toLongLong(&_status) * 1024
-                   * 1024 * 1024;
+        intValue = _value.remove(QString("G")).toLongLong(_status) * 1024 * 1024
+                   * 1024;
     else
-        intValue = _value.toInt(&_status);
+        intValue = _value.toInt(_status);
 
     qCInfo(LOG_LIB) << "Converted value" << intValue;
     return intValue;
diff --git a/sources/queued/src/QueuedProcessManager.cpp b/sources/queued/src/QueuedProcessManager.cpp
index ba0de53..f785d4e 100644
--- a/sources/queued/src/QueuedProcessManager.cpp
+++ b/sources/queued/src/QueuedProcessManager.cpp
@@ -52,9 +52,9 @@ QueuedProcessManager::~QueuedProcessManager()
 /**
  * @fn add
  */
-QueuedProcess *
-QueuedProcessManager::add(const long long _index,
-                          const QueuedProcessDefinitions _definitions)
+QueuedProcess *QueuedProcessManager::add(
+    const long long _index,
+    const QueuedProcess::QueuedProcessDefinitions _definitions)
 {
     qCDebug(LOG_LIB) << "Add new process" << _definitions.cmd << "with index"
                      << _index;
@@ -99,7 +99,7 @@ QueuedProcess *QueuedProcessManager::process(const long long _index)
 /**
  * @fn processes
  */
-QueuedProcessMap QueuedProcessManager::processes()
+QueuedProcessManager::QueuedProcessMap QueuedProcessManager::processes()
 {
     return m_processes;
 }
diff --git a/sources/queued/src/QueuedSettings.cpp b/sources/queued/src/QueuedSettings.cpp
new file mode 100644
index 0000000..52b40cd
--- /dev/null
+++ b/sources/queued/src/QueuedSettings.cpp
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2016 Evgeniy Alekseev
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ *
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ */
+/**
+ * @file QueuedSettings.cpp
+ * Source code of queued library
+ * @author Evgeniy Alekseev
+ * @copyright GPLv3
+ * @bug https://github.com/arcan1s/queued/issues
+ */
+
+
+#include "queued/Queued.h"
+
+#include <QSettings>
+#include <QStandardPaths>
+
+
+/**
+ * @class QueuedSettings
+ */
+/**
+ * @fn QueuedSettings
+ */
+QueuedSettings::QueuedSettings(QObject *parent, const QString path)
+    : QObject(parent)
+    , m_path(path)
+{
+    qCDebug(LOG_LIB) << __PRETTY_FUNCTION__;
+
+    readConfiguration();
+}
+
+
+/**
+ * @fn ~QueuedSettings
+ */
+QueuedSettings::~QueuedSettings()
+{
+    qCDebug(LOG_LIB) << __PRETTY_FUNCTION__;
+}
+
+
+/**
+ * @fn admin
+ */
+QueuedCfg::QueuedAdminSetup QueuedSettings::admin() const
+{
+    return m_cfgAdmin;
+}
+
+
+/**
+ * @fn db
+ */
+QueuedCfg::QueuedDBSetup QueuedSettings::db() const
+{
+    return m_cfgDB;
+}
+
+
+/**
+ * @fn defaultPath
+ */
+QString QueuedSettings::defaultPath()
+{
+    QString fileName = QStandardPaths::locate(QStandardPaths::ConfigLocation,
+                                              QString("queued.ini"));
+    qCInfo(LOG_LIB) << "Found configuration file" << fileName;
+
+    return fileName;
+}
+
+
+/**
+ * @fn path
+ */
+QString QueuedSettings::path() const
+{
+    return m_path;
+}
+
+
+/**
+ * @fn readConfiguration
+ */
+void QueuedSettings::readConfiguration()
+{
+    QSettings settings(m_path, QSettings::IniFormat);
+    qCInfo(LOG_LIB) << "Read configuration from" << settings.fileName();
+
+    // administrator related settings
+    settings.beginGroup(QString("Administrator"));
+    m_cfgAdmin.name
+        = settings.value(QString("Username"), QString("root")).toString();
+    m_cfgAdmin.password = settings.value(QString("Password")).toString();
+    settings.endGroup();
+
+    // database related settings
+    settings.beginGroup(QString("Database"));
+    m_cfgDB.driver
+        = settings.value(QString("Driver"), QString("QSQLITE")).toString();
+    m_cfgDB.hostname = settings.value(QString("Hostname")).toString();
+    m_cfgDB.password = settings.value(QString("Password")).toString();
+    // get standard path for temporary files
+    QString defaultDB = QString("%1/queued.db")
+                            .arg(QStandardPaths::writableLocation(
+                                QStandardPaths::TempLocation));
+    m_cfgDB.path = settings.value(QString("Path"), defaultDB).toString();
+    m_cfgDB.port = settings.value(QString("Port")).toInt();
+    m_cfgDB.username = settings.value(QString("Username")).toString();
+    settings.endGroup();
+}
diff --git a/sources/queued/src/QueuedTokenManager.cpp b/sources/queued/src/QueuedTokenManager.cpp
new file mode 100644
index 0000000..01faf29
--- /dev/null
+++ b/sources/queued/src/QueuedTokenManager.cpp
@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2016 Evgeniy Alekseev
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ *
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ */
+/**
+ * @file QueuedTokenManager.cpp
+ * Source code of queued library
+ * @author Evgeniy Alekseev
+ * @copyright GPLv3
+ * @bug https://github.com/arcan1s/queued/issues
+ */
+
+
+#include "queued/Queued.h"
+
+#include <QTimer>
+#include <QUuid>
+
+
+/**
+ * @class QueuedTokenManager
+ */
+/**
+ * @fn QueuedTokenManager
+ */
+QueuedTokenManager::QueuedTokenManager(QObject *parent)
+    : QObject(parent)
+{
+    qCDebug(LOG_LIB) << __PRETTY_FUNCTION__;
+}
+
+
+/**
+ * @fn ~QueuedTokenManager
+ */
+QueuedTokenManager::~QueuedTokenManager()
+{
+    qCDebug(LOG_LIB) << __PRETTY_FUNCTION__;
+}
+
+
+/**
+ * @fn isTokenValid
+ */
+bool QueuedTokenManager::isTokenValid(const QString &_token)
+{
+    qCDebug(LOG_LIB) << "Check token on validity" << _token;
+
+    return m_tokens.contains(_token);
+}
+
+
+/**
+ * @fn registerToken
+ */
+QString QueuedTokenManager::registerToken(const QDateTime _validUntil)
+{
+    // generate from uuid
+    QString token
+        = QUuid::createUuid().toString().remove(QChar('{')).remove(QChar('}'));
+    qCInfo(LOG_LIB) << "Registered token" << token << "valid until"
+                    << _validUntil;
+
+    // append to internal storage
+    m_tokens[token] = _validUntil;
+    emit(tokenRegistered(token, _validUntil));
+
+    // and return requester
+    return token;
+}
+
+
+/**
+ * @fn setValues
+ */
+void QueuedTokenManager::setValues(const QList<QVariantHash> &_values)
+{
+    qCDebug(LOG_LIB) << "Set values from" << _values;
+
+    QDateTime now = QDateTime::currentDateTimeUtc();
+    m_tokens.clear();
+    for (auto &token : _values) {
+        QDateTime validUntil = QDateTime::fromString(
+            token[QString("validUntil")].toString(), Qt::ISODate);
+        if (validUntil <= now)
+            continue;
+        QString tokenId = token[QString("token")].toString();
+        m_tokens[tokenId] = validUntil;
+        QTimer::singleShot(validUntil.toMSecsSinceEpoch()
+                               - now.toMSecsSinceEpoch(),
+                           Qt::VeryCoarseTimer,
+                           [this, tokenId]() { return expireToken(tokenId); });
+    }
+}
+
+
+/**
+ * @fn expireToken
+ */
+void QueuedTokenManager::expireToken(const QString &_token)
+{
+    qCDebug(LOG_LIB) << "Expire token" << _token;
+
+    if (!m_tokens.contains(_token))
+        return;
+    m_tokens.remove(_token);
+    emit(tokenExpired(_token));
+}
diff --git a/sources/queued/src/QueuedUser.cpp b/sources/queued/src/QueuedUser.cpp
index c5a463b..723f459 100644
--- a/sources/queued/src/QueuedUser.cpp
+++ b/sources/queued/src/QueuedUser.cpp
@@ -32,7 +32,8 @@
 /**
  * @fn QueuedUser
  */
-QueuedUser::QueuedUser(QObject *parent, const QueuedUserDefinitions &definitions,
+QueuedUser::QueuedUser(QObject *parent,
+                       const QueuedUserDefinitions &definitions,
                        const long long index)
     : QObject(parent)
     , m_definitions(definitions)
diff --git a/sources/version.h.in b/sources/version.h.in
index a73e4c0..726b76b 100644
--- a/sources/version.h.in
+++ b/sources/version.h.in
@@ -19,6 +19,13 @@ const char SPECIAL_THANKS[] = "";
 #cmakedefine BUILD_LOAD
 #cmakedefine BUILD_TESTING
 
+// paths
+const char BIN_INSTALL_DIR[] = "@BIN_INSTALL_DIR@";
+const char DATA_INSTALL_DIR[] = "@DATA_INSTALL_DIR@";
+const char INCLUDE_INSTALL_DIR[] = "@INCLUDE_INSTALL_DIR@";
+const char LIB_INSTALL_DIR[] = "@LIB_INSTALL_DIR@";
+const char ROOT_INSTALL_DIR[] = "@CMAKE_INSTALL_PREFIX@";
+
 // links
 const char HOMEPAGE[] = "https://arcanis.me/projects/queued";
 const char REPOSITORY[] = "https://github.com/arcan1s/queued";