webui: Assign parent user with the new temporary account (#12489)
webui: Assign parent user with the new temporary account (#12489)

Web Handlers can generate STS tokens but forgot to create a parent user
and save it along with the temporary access account. This commit fixes
this.

fixes #12381 
NitishT/minio,minio/minio,krisis/minio,NitishT/minio,minio/minio,balamurugana/minio,krisis/minio,balamurugana/minio,vadmeste/minio,donatello/minio,vadmeste/minio,NitishT/minio,NitishT/minio,donatello/minio