var hash = HashPassword(password);

            var queryString = $"select username from Users where username = @username and password = @hash";

            var usernameParam = new SQLiteParameter("@username", SqlDbType.Text) { Value = username };
            var hashParam = new SQLiteParameter("@hash", SqlDbType.Text) { Value = hash };

            var command = new SQLiteCommand(queryString, connection);

            command.Parameters.Add(usernameParam);
            command.Parameters.Add(hashParam);

            command.Prepare();

            var result = command.ExecuteScalar();