dbUser

Name of a database user. If a user name matching db_user exists in the database, the temporary user credentials have the same permissions as the existing user. If db_user doesn't exist in the database and auto_create is True, a new user is created using the value for db_user with PUBLIC permissions. If a database user matching the value for db_user doesn't exist and not is False, then the command succeeds but the connection attempt will fail because the user doesn't exist in the database.