List the ACL tokens.

    :param consul_url: The Consul server URL.
    :return: List of ACLs

    CLI Example:

    .. code-block:: bash

        salt '*' consul.acl_list

def acl_list(consul_url=None, token=None, **kwargs):
    '''
    List the ACL tokens.

    :param consul_url: The Consul server URL.
    :return: List of ACLs

    CLI Example:

    .. code-block:: bash

        salt '*' consul.acl_list

    '''
    ret = {}
    data = {}
    if not consul_url:
        consul_url = _get_config()
        if not consul_url:
            log.error('No Consul URL found.')
            ret['message'] = 'No Consul URL found.'
            ret['res'] = False
            return ret

    if 'id' not in kwargs:
        ret['message'] = 'Required parameter "id" is missing.'
        ret['res'] = False
        return ret

    function = 'acl/list'
    ret = _query(consul_url=consul_url,
                 token=token,
                 data=data,
                 method='PUT',
                 function=function)
    return ret