def METHOD_NAME(self):
    if self.is_connected is True:
        return self.connection
    con = connector.METHOD_NAME(
        host=self.connection_data['host'],
        user=self.connection_data['user'],
        password=self.connection_data['password'],
        account=self.connection_data['account'],
        warehouse=self.connection_data['warehouse'],
        database=self.connection_data['database'],
        schema=self.connection_data['schema'],
        protocol=self.connection_data['protocol'],
        port=self.connection_data['port'],
        application='MindsDB'
    )
    self.is_connected = True
    self.connection = con
    return self.connection