anchor.diff:                                            from={Uid, Domain},
                                             location={Location, Domain},
                                             type="internal.user.role.add",
  -                                          metadata=[{"role", Role}]}) of
  +                                          metadata=[{"role", Role},
  +                                                    {"user", Name}]}) of
                   {ok, _} ->
                       json_helpers:ok(Domain);
                   {error, Reason} ->
  
positive.code:                                         auth=Auth,
                                          credential=Credential,
                                          metadata=Metadata}) of
          {ok, UId} -> 
              {ok, _} = uce_event:add(Domain, #uce_event{id={none, Domain},
                                                         from={UId, Domain},
                                                         location={"", Domain},
  
negative.code:                                           from={Uid, Domain},
                                            location={Location, Domain},
                                            type="internal.user.role.delete",
                                            metadata=[{"role", Role},
                                                      {"user", User}]}) of
                  {ok, _} ->
                      json_helpers:ok(Domain);
                  {error, Reason} ->
  