diff --git a/DataBaseLMS/interfacedatabaselms.cpp b/DataBaseLMS/interfacedatabaselms.cpp
index 6c8c0eb..1cea546 100644
--- a/DataBaseLMS/interfacedatabaselms.cpp
+++ b/DataBaseLMS/interfacedatabaselms.cpp
@@ -37,16 +37,32 @@ bool InterfaceDataBaseLMS::DBisConnected()
 
 //Инструкторы
 
-bool InterfaceDataBaseLMS::authorizationInstructor(QString login, QString password)
+bool InterfaceDataBaseLMS::authorizationInstructor(QString login, QString password, ErrorAuth& error)
 {
+    error = ErrorAuth::errNo;
+
     if(int id = selectUserID(DataBaseLMS::TypeUserDBInstructor, login, password))
     {
-        if(selectUserArchived(DataBaseLMS::TypeUserDBInstructor, id) || selectUserLoggedIn(DataBaseLMS::TypeUserDBInstructor, id))
+        if(selectUserArchived(DataBaseLMS::TypeUserDBInstructor, id))
+        {
+            error = ErrorAuth::errArchived;
             return false;
+        }
+
+        if(selectUserLoggedIn(DataBaseLMS::TypeUserDBInstructor, id))
+        {
+            error = ErrorAuth::errAlreadyLogIn;
+            return false;
+        }
 
         if(updateUserLoggedIn(DataBaseLMS::TypeUserDBInstructor, id, true))
             return true;
+        else
+            error = ErrorAuth::errDB;
     }
+    else
+        error = ErrorAuth::errLoginOrPassword;
+
     return false;
 }
 
@@ -118,16 +134,32 @@ bool InterfaceDataBaseLMS::isLoggedInInstructor(int id)
 
 //Инструкторы
 
-bool InterfaceDataBaseLMS::authorizationTrainee(QString login, QString password, QString classroom_name, QString computer_name)
+bool InterfaceDataBaseLMS::authorizationTrainee(QString login, QString password, ErrorAuth& error, QString classroom_name, QString computer_name)
 {
+    error = ErrorAuth::errNo;
+
     if(int id = selectUserID(DataBaseLMS::TypeUserDBTrainee, login, password))
     {
-        if(selectUserArchived(DataBaseLMS::TypeUserDBTrainee, id) || selectUserLoggedIn(DataBaseLMS::TypeUserDBTrainee, id))
+        if(selectUserArchived(DataBaseLMS::TypeUserDBTrainee, id))
+        {
+            error = ErrorAuth::errArchived;
             return false;
+        }
+
+        if(selectUserLoggedIn(DataBaseLMS::TypeUserDBTrainee, id))
+        {
+            error = ErrorAuth::errAlreadyLogIn;
+            return false;
+        }
 
         if(updateUserLoggedIn(DataBaseLMS::TypeUserDBTrainee, id, true))
             return true;
+        else
+            error = ErrorAuth::errDB;
     }
+    else
+        error = ErrorAuth::errLoginOrPassword;
+
     return false;
 }
 
diff --git a/DataBaseLMS/interfacedatabaselms.h b/DataBaseLMS/interfacedatabaselms.h
index 5ad17a4..a63f7c4 100644
--- a/DataBaseLMS/interfacedatabaselms.h
+++ b/DataBaseLMS/interfacedatabaselms.h
@@ -10,6 +10,15 @@
 
 class DATABASELMS_EXPORT InterfaceDataBaseLMS : public DataBaseLMS
 {
+public:
+    enum ErrorAuth
+    {
+        errNo = 0,
+        errDB,
+        errLoginOrPassword,
+        errArchived,
+        errAlreadyLogIn
+    };
 public:
     InterfaceDataBaseLMS(QWidget *ownerWidget, QObject *parent = nullptr);
 
@@ -22,7 +31,7 @@ public:
 
     //Инструкторы
 
-    bool authorizationInstructor(QString login, QString password);
+    bool authorizationInstructor(QString login, QString password, ErrorAuth& error);
     bool deAuthorizationInstructor(QString login);
     bool deAuthorizationAllInstructors();
 
@@ -43,7 +52,7 @@ public:
 
     //Обучаемые
 
-    bool authorizationTrainee(QString login, QString password, QString classroom_name, QString computer_name);
+    bool authorizationTrainee(QString login, QString password, ErrorAuth& error, QString classroom_name, QString computer_name);
     bool deAuthorizationTrainee(QString login);
     bool deAuthorizationAllTrainees();    
 
diff --git a/InstructorsAndTrainees/connectorToServer/Core/recognizesystem.cpp b/InstructorsAndTrainees/connectorToServer/Core/recognizesystem.cpp
index 3d4dab8..8705ca1 100644
--- a/InstructorsAndTrainees/connectorToServer/Core/recognizesystem.cpp
+++ b/InstructorsAndTrainees/connectorToServer/Core/recognizesystem.cpp
@@ -456,16 +456,33 @@ void RecognizeSystem::xmlParser(QByteArray array)
 
                 if(name == "Code")
                 {
-                    if (value == "END")
+                    if (value == NOTIFY_SERVER_END)
                     {
                         emit sigSocketDisabled();
                     }
 
-                    if(value == "BLOCKED")
+                    if(value == NOTIFY_SERVER_BLOCKED)
                     {
                         emit sigServerBlocked();
                     }
 
+                    if(value == NOTIFY_ERROR_AUTH_DB)
+                    {
+                        emit sigErrorAuth(value);
+                    }
+                    if(value == NOTIFY_ERROR_AUTH_LOGINORPASSWORD)
+                    {
+                        emit sigErrorAuth(value);
+                    }
+                    if(value == NOTIFY_ERROR_AUTH_ARCHIVED)
+                    {
+                        emit sigErrorAuth(value);
+                    }
+                    if(value == NOTIFY_ERROR_AUTH_ALREADYLOGIN)
+                    {
+                        emit sigErrorAuth(value);
+                    }
+
                     if(value == "HASHSENDCOMPLETE")
                     {
                         emit sigStartCompare();
diff --git a/InstructorsAndTrainees/connectorToServer/Core/recognizesystem.h b/InstructorsAndTrainees/connectorToServer/Core/recognizesystem.h
index 60f232c..f679249 100644
--- a/InstructorsAndTrainees/connectorToServer/Core/recognizesystem.h
+++ b/InstructorsAndTrainees/connectorToServer/Core/recognizesystem.h
@@ -34,6 +34,7 @@ signals:
     void sigSendDebugLog(QString message);
     void sigSocketDisabled();
     void sigServerBlocked();
+    void sigErrorAuth(QString error);
     void sigAuth(ServerAuthorization *serverAuth);
     void sigDeAuth(ServerDeAuthorization *serverDeAuth);
     void sigAnswerQueryToDB(QList<Instructor>* listInstructors,
diff --git a/InstructorsAndTrainees/connectorToServer/Core/tools.h b/InstructorsAndTrainees/connectorToServer/Core/tools.h
index 622badb..25c1152 100644
--- a/InstructorsAndTrainees/connectorToServer/Core/tools.h
+++ b/InstructorsAndTrainees/connectorToServer/Core/tools.h
@@ -71,6 +71,14 @@ enum PacketType{
     FREE = 155
 };
 
+#define NOTIFY_ERROR_AUTH_DB                "ERROR_AUTH_DB"
+#define NOTIFY_ERROR_AUTH_LOGINORPASSWORD   "ERROR_AUTH_LOGINORPASSWORD"
+#define NOTIFY_ERROR_AUTH_ARCHIVED          "ERROR_AUTH_ARCHIVED"
+#define NOTIFY_ERROR_AUTH_ALREADYLOGIN      "ERROR_AUTH_ALREADYLOGIN"
+#define NOTIFY_SERVER_END                   "END"
+#define NOTIFY_SERVER_BLOCKED               "BLOCKED"
+#define SERVER_HELLO                        "NewConnection. I am server LMS!"
+
 //Q_DECLARE_METATYPE(PacketType)
 
 class Tools {
diff --git a/InstructorsAndTrainees/connectorToServer/connectortoserver.cpp b/InstructorsAndTrainees/connectorToServer/connectortoserver.cpp
index d82e95b..839809e 100644
--- a/InstructorsAndTrainees/connectorToServer/connectortoserver.cpp
+++ b/InstructorsAndTrainees/connectorToServer/connectortoserver.cpp
@@ -90,6 +90,11 @@ void ConnectorToServer::slot_ServerBlocked()
     emit sigServerBlocked();
 }
 
+void ConnectorToServer::slot_ErrorAuth(QString error)
+{
+    emit sigErrorAuth(error);
+}
+
 void ConnectorToServer::slot_SendDeleteVersion(StreamingVersionData *streaming)
 {
     emit signal_SendDeleteVersion(streaming);
@@ -133,6 +138,7 @@ void ConnectorToServer::bindConnection()
     connect(recognizeSystem,&RecognizeSystem::sigDeAuth,this,&ConnectorToServer::sigDeLoginResult);
 
     connect(recognizeSystem,&RecognizeSystem::sigServerBlocked,this,&ConnectorToServer::slot_ServerBlocked);
+    connect(recognizeSystem,&RecognizeSystem::sigErrorAuth,this,&ConnectorToServer::slot_ErrorAuth);
 
     connect(recognizeSystem,&RecognizeSystem::signal_ReceiveMessage,this,&ConnectorToServer::signal_receiveMessage,Qt::AutoConnection);
     connect(recognizeSystem,&RecognizeSystem::sigShowServerDataList,this,&ConnectorToServer::slot_showServerList);
diff --git a/InstructorsAndTrainees/connectorToServer/connectortoserver.h b/InstructorsAndTrainees/connectorToServer/connectortoserver.h
index d4663bb..be5d2db 100644
--- a/InstructorsAndTrainees/connectorToServer/connectortoserver.h
+++ b/InstructorsAndTrainees/connectorToServer/connectortoserver.h
@@ -108,6 +108,7 @@ public slots:
     void slot_HashReady();
     void slot_Auth(ServerAuthorization * serverAuth);
     void slot_ServerBlocked();
+    void slot_ErrorAuth(QString error);
 
     void slot_SendDeleteVersion(StreamingVersionData *streaming);
     void slot_SendSwitchVersion(StreamingVersionData *selectVersion);
@@ -125,6 +126,7 @@ signals:
     void sigLoginResult(ServerAuthorization * serverAuth);
     void sigDeLoginResult(ServerDeAuthorization * serverDeAuth);
     void sigServerBlocked();
+    void sigErrorAuth(QString error);
 
     void signal_UpdateDB(bool treeInstructor, bool treeTrainee);
 
diff --git a/InstructorsAndTrainees/instructorsandtraineeswidget.cpp b/InstructorsAndTrainees/instructorsandtraineeswidget.cpp
index 6bac7e4..ec8ec36 100644
--- a/InstructorsAndTrainees/instructorsandtraineeswidget.cpp
+++ b/InstructorsAndTrainees/instructorsandtraineeswidget.cpp
@@ -54,6 +54,7 @@ InstructorsAndTraineesWidget::InstructorsAndTraineesWidget(QWidget *parent) :
     connect(connectorToServer, &ConnectorToServer::sigLoginResult, this, &InstructorsAndTraineesWidget::slot_checkLoginResult);
     connect(connectorToServer, &ConnectorToServer::sigDeLoginResult, this, &InstructorsAndTraineesWidget::slot_checkDeLoginResult);
     connect(connectorToServer, &ConnectorToServer::sigServerBlocked, this, &InstructorsAndTraineesWidget::slot_ServerBlocked);
+    connect(connectorToServer, &ConnectorToServer::sigErrorAuth, this, &InstructorsAndTraineesWidget::slot_ErrorAuth);
     connect(connectorToServer,&ConnectorToServer::signal_AnswerDocsChanged,this, &InstructorsAndTraineesWidget::slot_AnswerDocsChanged);
 
     messangerController = new MessangerController(connectorToServer, this);
@@ -239,16 +240,14 @@ void InstructorsAndTraineesWidget::slot_checkLoginResult(ServerAuthorization *se
         viewerInstructors->activate();
 
         waitAnimationWidget->hideWithStop();
+
+        flTryLogin = false;
     }
     else
     {
-        waitAnimationWidget->hideWithStop();
-
-        ui->btnAuthorizationInstructor->setChecked(false);
-        SpecialMessageBox(this, SpecialMessageBox::TypeSpecMsgBox::critical, tr("Instructor authorization.") + "\n" + tr("Invalid login or password!")).exec();
+        //waitAnimationWidget->hideWithStop();
+        //ui->btnAuthorizationInstructor->setChecked(false);
     }
-
-    flTryLogin = false;
 }
 
 void InstructorsAndTraineesWidget::slot_checkDeLoginResult(ServerDeAuthorization *serverDeAuth)
@@ -285,7 +284,39 @@ void InstructorsAndTraineesWidget::slot_ServerBlocked()
         waitAnimationWidget->hideWithStop();
 
         ui->btnAuthorizationInstructor->setChecked(false);
-        SpecialMessageBox(this, SpecialMessageBox::TypeSpecMsgBox::warningClose, tr("Server blocked!")).exec();
+        SpecialMessageBox(this, SpecialMessageBox::TypeSpecMsgBox::warningClose, tr("Instructor authorization.") + "\n" + tr("Server blocked!")).exec();
+    }
+}
+
+void InstructorsAndTraineesWidget::slot_ErrorAuth(QString error)
+{
+    if(flTryLogin)
+    {
+        flTryLogin = false;
+        waitAnimationWidget->hideWithStop();
+
+        ui->btnAuthorizationInstructor->setChecked(false);
+
+        QString errorTextMsg = "";
+
+        if(error == NOTIFY_ERROR_AUTH_DB)
+        {
+            errorTextMsg = tr("Database error!");
+        }
+        else if(error == NOTIFY_ERROR_AUTH_ARCHIVED)
+        {
+            errorTextMsg = tr("The user is archived!");
+        }
+        else if(error == NOTIFY_ERROR_AUTH_ALREADYLOGIN)
+        {
+            errorTextMsg = tr("The user is already logged in!");
+        }
+        else if(error == NOTIFY_ERROR_AUTH_LOGINORPASSWORD)
+        {
+            errorTextMsg = tr("Login or password error!");
+        }
+
+        SpecialMessageBox(this, SpecialMessageBox::TypeSpecMsgBox::warningClose, tr("Instructor authorization.") + "\n" + errorTextMsg).exec();
     }
 }
 
diff --git a/InstructorsAndTrainees/instructorsandtraineeswidget.h b/InstructorsAndTrainees/instructorsandtraineeswidget.h
index 307754b..2cd5624 100644
--- a/InstructorsAndTrainees/instructorsandtraineeswidget.h
+++ b/InstructorsAndTrainees/instructorsandtraineeswidget.h
@@ -54,6 +54,7 @@ public Q_SLOTS:
     void slot_checkDeLoginResult(ServerDeAuthorization * serverDeAuth);
 
     void slot_ServerBlocked();
+    void slot_ErrorAuth(QString error);
 
     //Слот обработки результата подключения к серверу
     void slot_ConnectedToServer(bool state);
diff --git a/ServerLMS/Data/typesDataServerClient.h b/ServerLMS/Data/typesDataServerClient.h
index 7135dff..7a6ab49 100644
--- a/ServerLMS/Data/typesDataServerClient.h
+++ b/ServerLMS/Data/typesDataServerClient.h
@@ -5,9 +5,13 @@
 #include <QString>
 #include "typeQueryToDB.h"
 
-#define NOTIFY_SERVER_END            "END"
-#define NOTIFY_SERVER_BLOCKED   "BLOCKED"
-#define SERVER_HELLO                     "NewConnection. I am server LMS!"
+#define NOTIFY_ERROR_AUTH_DB                "ERROR_AUTH_DB"
+#define NOTIFY_ERROR_AUTH_LOGINORPASSWORD   "ERROR_AUTH_LOGINORPASSWORD"
+#define NOTIFY_ERROR_AUTH_ARCHIVED          "ERROR_AUTH_ARCHIVED"
+#define NOTIFY_ERROR_AUTH_ALREADYLOGIN      "ERROR_AUTH_ALREADYLOGIN"
+#define NOTIFY_SERVER_END                   "END"
+#define NOTIFY_SERVER_BLOCKED               "BLOCKED"
+#define SERVER_HELLO                        "NewConnection. I am server LMS!"
 
 enum EStateServer{started, stoped};
 enum EStateBlockAutorization{blocked, unblocked};
diff --git a/ServerLMS/Systems/processingsystem.cpp b/ServerLMS/Systems/processingsystem.cpp
index 61d5997..96b15e9 100644
--- a/ServerLMS/Systems/processingsystem.cpp
+++ b/ServerLMS/Systems/processingsystem.cpp
@@ -39,8 +39,6 @@ void ProcessingSystem::processingClientAutorization(ClientHandler *client, Clien
     {
         QByteArray arrayAnswer = dataParser->ClientAnswer()->notify(NOTIFY_SERVER_BLOCKED);
         client->sendXmlAnswer(arrayAnswer);
-
-        QString str = QString(arrayAnswer);
         return;
     }
 
@@ -50,8 +48,10 @@ void ProcessingSystem::processingClientAutorization(ClientHandler *client, Clien
     QByteArray arrayAnswer;
     int clientID = 0;
 
+    InterfaceDataBaseLMS::ErrorAuth errorAuth = InterfaceDataBaseLMS::ErrorAuth::errNo;
 
-    if(providerDBLMS->authorizationInstructor(clientAutorization.Login, clientAutorization.Password))
+
+    if(providerDBLMS->authorizationInstructor(clientAutorization.Login, clientAutorization.Password, errorAuth))
     {//Авторизуется инструктор
 
         client->getClient()->setLogin(clientAutorization.Login);
@@ -67,7 +67,7 @@ void ProcessingSystem::processingClientAutorization(ClientHandler *client, Clien
     }
     else if(clientAutorization.TypeClient != TypeClientAutorization::TYPE_GUI)
     {
-        if(providerDBLMS->authorizationTrainee(clientAutorization.Login, clientAutorization.Password, "", ""))
+        if(providerDBLMS->authorizationTrainee(clientAutorization.Login, clientAutorization.Password, errorAuth, "", ""))
         {//Авторизуется обучаемый
 
             client->getClient()->setLogin(clientAutorization.Login);
@@ -91,15 +91,42 @@ void ProcessingSystem::processingClientAutorization(ClientHandler *client, Clien
         arrayAnswer = dataParser->ClientAnswer()->authorization(false, "", "", "", "", 0);
     }
     client->sendXmlAnswer(arrayAnswer);
-    client->sendVersion();
 
-    //client->sendPacketType(PacketType::BUSY);
-    //client->sendPacketType(PacketType::FREE);
+    if(errorAuth == InterfaceDataBaseLMS::ErrorAuth::errNo)
+    {
+        client->sendVersion();
 
-    QString str = QString(arrayAnswer);
-    //logger->addTextToLogger("To Client: " + str);
-    //Извещаем об изменениях в авторизации
-    emit sigListsInstructorsTraineesChanged();
+        //client->sendPacketType(PacketType::BUSY);
+        //client->sendPacketType(PacketType::FREE);
+
+        //Извещаем об изменениях в авторизации
+        emit sigListsInstructorsTraineesChanged();
+    }
+    else
+    {
+        QString notifyText = "";
+
+        switch (errorAuth)
+        {
+        case InterfaceDataBaseLMS::ErrorAuth::errDB:
+            notifyText = NOTIFY_ERROR_AUTH_DB;
+                break;
+        case InterfaceDataBaseLMS::ErrorAuth::errArchived:
+            notifyText = NOTIFY_ERROR_AUTH_ARCHIVED;
+                break;
+        case InterfaceDataBaseLMS::ErrorAuth::errAlreadyLogIn:
+            notifyText = NOTIFY_ERROR_AUTH_ALREADYLOGIN;
+                break;
+        case InterfaceDataBaseLMS::ErrorAuth::errLoginOrPassword:
+            notifyText = NOTIFY_ERROR_AUTH_LOGINORPASSWORD;
+                break;
+        default:
+            break;
+        }
+
+        QByteArray arrayAnswer = dataParser->ClientAnswer()->notify(notifyText);
+        client->sendXmlAnswer(arrayAnswer);
+    }
 }
 
 void ProcessingSystem::processingClientDeAutorization(ClientHandler *client, ClientDeAutorization clientDeAutorization)
@@ -129,6 +156,10 @@ void ProcessingSystem::processingClientDeAutorization(ClientHandler *client, Cli
         emit sigUpdateListClients();
 
         arrayAnswer = dataParser->ClientAnswer()->deAuthorization(true, clientDeAutorization.Login);
+        client->sendXmlAnswer(arrayAnswer);
+
+        //Извещаем об изменениях в авторизации
+        emit sigListsInstructorsTraineesChanged();
     }
     else if(providerDBLMS->deAuthorizationInstructor(clientDeAutorization.Login))
     {//ДеАвторизуется инструктор
@@ -139,18 +170,16 @@ void ProcessingSystem::processingClientDeAutorization(ClientHandler *client, Cli
         emit sigUpdateListClients();
 
         arrayAnswer = dataParser->ClientAnswer()->deAuthorization(true, clientDeAutorization.Login);
+        client->sendXmlAnswer(arrayAnswer);
+
+        //Извещаем об изменениях в авторизации
+        emit sigListsInstructorsTraineesChanged();
     }
     else
     {//Никто не ДеАвторизовался
         arrayAnswer = dataParser->ClientAnswer()->deAuthorization(false, "");
+        client->sendXmlAnswer(arrayAnswer);
     }
-    client->sendXmlAnswer(arrayAnswer);
-
-    QString str = QString(arrayAnswer);
-    //logger->addTextToLogger("To Client: " + str);
-
-    //Извещаем об изменениях в авторизации
-    emit sigListsInstructorsTraineesChanged();
 }
 
 void ProcessingSystem::processingClientBlockAuth(ClientHandler *client, bool block)
diff --git a/ServerLMS/providerdblms/providerdblms.cpp b/ServerLMS/providerdblms/providerdblms.cpp
index 1a2a57e..8707b58 100644
--- a/ServerLMS/providerdblms/providerdblms.cpp
+++ b/ServerLMS/providerdblms/providerdblms.cpp
@@ -108,7 +108,7 @@ QString ProviderDBLMS::getMainInstructorName()
     return QStringLiteral("");
 }
 
-bool ProviderDBLMS::authorizationTrainee(QString login, QString password, QString classroom_name, QString computer_name)
+bool ProviderDBLMS::authorizationTrainee(QString login, QString password, InterfaceDataBaseLMS::ErrorAuth& error, QString classroom_name, QString computer_name)
 {
     mtxAccess.lock();
 
@@ -120,7 +120,7 @@ bool ProviderDBLMS::authorizationTrainee(QString login, QString password, QStrin
 
     //Q_EMIT signal_BlockAutorization(true);
 
-    bool res = dbLMS->authorizationTrainee(login, password, classroom_name, computer_name);
+    bool res = dbLMS->authorizationTrainee(login, password, error, classroom_name, computer_name);
 
     //Q_EMIT signal_BlockAutorization(false);
 
@@ -164,7 +164,7 @@ QString ProviderDBLMS::getNameTraineeByLogin(QString login)
     return res;
 }
 
-bool ProviderDBLMS::authorizationInstructor(QString login, QString password)
+bool ProviderDBLMS::authorizationInstructor(QString login, QString password, InterfaceDataBaseLMS::ErrorAuth& error)
 {
     mtxAccess.lock();
 
@@ -176,7 +176,7 @@ bool ProviderDBLMS::authorizationInstructor(QString login, QString password)
 
     //Q_EMIT signal_BlockAutorization(true);
 
-    bool res = dbLMS->authorizationInstructor(login, password);
+    bool res = dbLMS->authorizationInstructor(login, password, error);
 
     //Q_EMIT signal_BlockAutorization(false);
 
diff --git a/ServerLMS/providerdblms/providerdblms.h b/ServerLMS/providerdblms/providerdblms.h
index 2c58257..bda33fb 100644
--- a/ServerLMS/providerdblms/providerdblms.h
+++ b/ServerLMS/providerdblms/providerdblms.h
@@ -16,12 +16,12 @@ public:
     QString getMainInstructorName();
 
     //Авторизация обучаемого на клиенте
-    bool authorizationTrainee(QString login, QString password, QString classroom_name = QStringLiteral(""), QString computer_name = QStringLiteral(""));
+    bool authorizationTrainee(QString login, QString password, InterfaceDataBaseLMS::ErrorAuth& error, QString classroom_name = QStringLiteral(""), QString computer_name = QStringLiteral(""));
     bool deAuthorizationTrainee(QString login);
     QString getNameTraineeByLogin(QString login);
 
     //Авторизация инструктора на клиенте
-    bool authorizationInstructor(QString login, QString password);
+    bool authorizationInstructor(QString login, QString password, InterfaceDataBaseLMS::ErrorAuth& error);
     bool deAuthorizationInstructor(QString login);
     QString getNameInstructorByLogin(QString login);