code: def create_db_instance(self, params):
          ''' Create db instance '''
          if not self.connect_to_aws_rds():
              return False
          try:
              database = self.rdsc.create_dbinstance(
                  id=params['id'],
                  allocated_storage=params['size'],
                  instance_class='db.t1.micro',
                  engine='MySQL',
                  master_username=params['username'],
                  master_password=params['password'],
                  db_name=params['dbname'],
                  multi_az=False
              )
          except:
              return False
          else:
              return Truf create_db_instance(self, params):
          ''' Create db instance '''
          if not self.connect_to_aws_rds():
              return False
          try:
              database = self.rdsc.create_dbinstance(
                  id=params['id'],
                  allocated_storage=params['size'],
                  instance_class='db.t1.micro',
                  engine='MySQL',
                  master_username=params['username'],
                  master_password=params['password'],
                  db_name=params['dbname'],
                  multi_az=False
              )
          except:
              return False
          else:
              return True
docs: Create db instance