connect method
Implementation
@override
Future<MySqlConnection> connect(DatabaseSettings? settings) async {
if (settings == null) throw NullableSettings("Failed to create a instance of MySQL when settings is null.");
var connection = await MySqlConnection.connect(ConnectionSettings(
host: settings.host,
port: settings.port,
user: settings.user,
password: settings.password,
db: settings.db,
));
conn = connection;
return connection;
}