def remove_group_user(self, group_id, user_id):
response = self._perform_request(<EOL>url='<STR_LIT>' % (group_id, user_id),<EOL>method='<STR_LIT>')<EOL>return response<EOL>
Removes a user from a group.

:param      group_id: The unique ID of the group.
:type       group_id: ``str``

:param      user_id: The unique ID of the user.
:type       user_id: ``str``