fix #1885 redirect from login URL is already logged in as a non-guest user
fix #1885 redirect from login URL is already logged in as a non-guest user

radiasoft/sirepo,mkeilman/sirepo,mkeilman/sirepo,mkeilman/sirepo,mkeilman/sirepo,radiasoft/sirepo,mrakitin/sirepo,radiasoft/sirepo,radiasoft/sirepo,mrakitin/sirepo,mrakitin/sirepo,radiasoft/sirepo,mrakitin/sirepo