code: func (s *GroupsService) AddGroupMembers(groupID string, input *MembersInput) (*[]AccountInfo, *Response, error) {
  	u := fmt.Sprintf("groups/%s/members", groupID)
  
  	req, err := s.client.NewRequest("POST", u, input)
  	if err != nil {
  		return nil, nil, err
  	}
  
  	v := new([]AccountInfo)
  	resp, err := s.client.Do(req, v)
  	if err != nil {
  		return nil, resp, err
  	}
  
  	return v, resp, err
  }
docs: // AddGroupMembers adds one or several users to a Gerrit internal group.
  // The users to be added to the group must be provided in the request body as a MembersInput entity.
  //
  // As response a list of detailed AccountInfo entities is returned that describes the group members that were specified in the MembersInput.
  // An AccountInfo entity is returned for each user specified in the input, independently of whether the user was newly added to the group or whether the user was already a member of the group.
  //
  // Gerrit API docs: https://gerrit-review.googlesource.com/Documentation/rest-api-groups.html#_add_group_members