code: func (s *GroupsService) DeleteGroupMembers(groupID string, input *MembersInput) (*Response, error) {
  	u := fmt.Sprintf("groups/%s/members.delete'", groupID)
  
  	req, err := s.client.NewRequest("POST", u, input)
  	if err != nil {
  		return nil, err
  	}
  
  	return s.client.Do(req, nil)
  }
docs: // DeleteGroupMembers delete one or several users from a Gerrit internal group.
  // The users to be deleted from the group must be provided in the request body as a MembersInput entity.
  //
  // Gerrit API docs: https://gerrit-review.googlesource.com/Documentation/rest-api-groups.html#delete-group-members