улучшает логи и добавляет метод для удаления пользователя

Authorization.cs

@@ -117,6 +117,22 @@ namespace AwesomeEmailExtractor
             command.ExecuteNonQuery();
         }
 
+        public void deleteUser(string login)
+        {
+            if (User.Role != UserRoles.ADMIN)
+            {
+                throw new Exception("Недостаточно прав!");
+            }
+
+            SqliteCommand command = new SqliteCommand();
+            command.Connection = Globals.db;
+            command.CommandText = "DELETE FROM users WHERE login = @login";
+
+            SqliteParameter loginParam = new SqliteParameter("@login", login);
+            command.Parameters.Add(loginParam);
+
+            command.ExecuteNonQuery();
+        }
         public List<User> getAllUsers()
         {
             if (User.Role != UserRoles.ADMIN)

AuthorizationForm.cs

@@ -22,6 +22,7 @@ namespace AwesomeEmailExtractor
             try
             {
                 Globals.currentUser = Authorization.Login(entryLogin.Text, entryPassword.Text);
+                Logs.Log(Globals.currentUser, Logs.Action.Login, new Dictionary<string, object>());
 
                 var mainForm = FormManager.Current.CreateForm<MainForm>();
                 FormManager.Current.Navigate(this, mainForm);

Globals.cs

@@ -66,7 +66,7 @@ namespace AwesomeEmailExtractor
             command.CommandText = "CREATE TABLE IF NOT EXISTS logs_actions (id INTEGER PRIMARY KEY, name TEXT NOT NULL)";
             command.ExecuteNonQuery();
 
-            command.CommandText = "INSERT OR IGNORE INTO logs_actions (id, name) VALUES (0, 'Выполнение');";
+            command.CommandText = "INSERT OR IGNORE INTO logs_actions (id, name) VALUES (0, 'Выполнение'), (1, 'Вход'), (2, 'Регистрация');";
             command.ExecuteNonQuery();
 
             command.CommandText = "CREATE TABLE IF NOT EXISTS logs (id INTEGER PRIMARY KEY AUTOINCREMENT, user_id INTEGER NOT NULL, date TEXT NOT NULL, action INTEGER NOT NULL, message TEXT NOT NULL, FOREIGN KEY(action) REFERENCES logs_actions(id));";

Logs.cs

@@ -19,6 +19,8 @@ namespace AwesomeEmailExtractor
         public enum Action
         {
             Execute,
+            Login,
+            Registration
         }
 
         public static void Log(User user, Action action, Dictionary<string, object> options)
@@ -68,7 +70,15 @@ namespace AwesomeEmailExtractor
             command.Parameters.AddWithValue("@dbpath", Globals.getAppDatabase());
             command.ExecuteNonQuery();
             
-            command.CommandText = "SELECT user_id, appDB.users.login, appDB.users.id as role_id, date, action, message FROM logs LEFT JOIN appDB.users ON logs.user_id = appDB.users.id ORDER BY date DESC ";
+            command.CommandText = @"
+                SELECT 
+                    user_id,
+                    CASE WHEN appDB.users.login is NULL THEN 'Deleted_' || user_id ELSE appDB.users.login END AS login
+                    appDB.users.role,
+                    date,
+                    action,
+                    message
+                from logs LEFT JOIN appDB.users on logs.user_id = appDB.users.id ORDER BY date DESC";
 
             SqliteDataReader reader = command.ExecuteReader();
 
@@ -100,10 +110,16 @@ namespace AwesomeEmailExtractor
                     $"Найдено {count} email-ов.\n" +
                     $"Список уникальных: {String.Join(", ", uniqueEmails)}.";
             }
-            else
+            if (action == Action.Login)
             {
-                return "";
+                return "Пользователь вошел в систему.";
             }
+            if (action == Action.Registration)
+            {
+                return "Пользователь зарегистрировался в системе.";
+            }
+
+            return "";
         }
     }
 }

MainForm.cs

@@ -45,7 +45,7 @@ namespace AwesomeEmailExtractor
             uniqueListBox.DataSource = uniqueEmails;
 
             Logs.Log(
-                new User(1, "", UserRoles.ADMIN), 
+                Globals.currentUser, 
                 Logs.Action.Execute, 
                 new Dictionary<string, object>() { 
                     { "sourceText", sourceText }, 

RegistrationForm.cs

@@ -28,6 +28,7 @@ namespace AwesomeEmailExtractor
             try
             {
                 Globals.currentUser = Authorization.Register(entryLogin.Text, entryPassword.Text);
+                Logs.Log(Globals.currentUser, Logs.Action.Registration, new Dictionary<string, object>());
                 
                 var form = FormManager.Current.CreateForm<MainForm>();
                 FormManager.Current.Navigate(this, form);