anchor.diff:      Response = do_request(RestAddress ++ "/user/groups/join", Headers, post, Body, Options),
       get_header_val("user/groups",Response).
   
  -%% Group functions
  +%% Group functions ==============================================================
   
   create_group(GroupName, ReqParams) ->
       {RestAddress, Headers, Options} = ReqParams,
  
positive.code:     DefSpace.
  
  create_space_for_user(SpaceName, ReqParams) ->
      ?PRINT(SpaceName),
      ?PRINT(ReqParams),
      {RestAddress, Headers, Options} = ReqParams,
      Body = jiffy:encode({[
          {name, SpaceName}
      ]}),
      Response = do_request(RestAddress ++ "/user/spaces", Headers, post, Body, Options),
      ?PRINT(Response),
      get_header_val("spaces", Response).
  
  set_default_space_for_user(SID, ReqParams) ->
  
negative.code:     {RestAddress, Headers, Options} = ReqParams,
      {RestAddress, Headers, Options++ NewParam}.
  
  %% Provider functions =====================================================
  register_provider(URLS, RedirectionPoint, ClientName, Config, ReqParams) ->
      {RestAddress, Headers, _Options} = ReqParams,
      {KeyFile, CSRFile, CertFile} = ?config(cert_files, Config),
  