Get members in a Redis set

    CLI Example:

    .. code-block:: bash

        salt '*' redis.smembers foo_set

def smembers(key, host=None, port=None, db=None, password=None):
    '''
    Get members in a Redis set

    CLI Example:

    .. code-block:: bash

        salt '*' redis.smembers foo_set
    '''
    server = _connect(host, port, db, password)
    return list(server.smembers(key))