anchor.diff:          ok ->
               echessd_log:info(
                 "user ~9999p added (~9999p)",
  -              [Username, UserInfo0]);
  +              [Username, hide_sensitive(UserInfo0)]);
           {error, Reason} ->
               echessd_log:err(
                 "user ~9999p add failed: ~9999p",
  
positive.code: %% Internal functions
  %% ----------------------------------------------------------------------
  
  is_valid_username([_ | _] = String) ->
      lists:all(
        fun(C) ->
  
negative.code:         ok ->
              echessd_log:info(
                "user ~9999p props updated: ~9999p",
                [Username, hide_sensitive(UserInfo0)]),
              ok;
          {error, Reason} = FinalError ->
              echessd_log:err(
  