def METHOD_NAME(self, group_id, user_id):
    '''
    Delete a user from a user group.
    :devportal:`groups: delete-user <groups-delete-user>`
    Args:
        group_id (int):
            The unique identifier for the group to be modified.
        user_id (int):
            The unique identifier for the user to be removed from the group.
    Returns:
        :obj:`None`:
            The user was successfully removed from the group.
    Examples:
        >>> tio.groups.delete_user(1, 1)
    '''
    self._api.delete('groups/{}/users/{}'.format(
        self._check('group_id', group_id, int),
        self._check('user_id', user_id, int)
    ))