Delete a user from a group in CommonSense.
            
            @return (bool) - Boolean indicating whether GroupsPost was successful.

def GroupsUsersDelete(self, group_id, user_id):
        """
            Delete a user from a group in CommonSense.
            
            @return (bool) - Boolean indicating whether GroupsPost was successful.
        """
        if self.__SenseApiCall__('/groups/{group_id}/users/{user_id}.json'.format(group_id = group_id, user_id = user_id), 'DELETE'):
            return True
        else:
            self.__error__ = "api call unsuccessful"
            return False