Add get_user_by_email util
Add get_user_by_email util

OmeGak/indico,pferreir/indico,DirkHoffmann/indico,OmeGak/indico,mvidalgarcia/indico,indico/indico,ThiefMaster/indico,indico/indico,ThiefMaster/indico,mic4ael/indico,OmeGak/indico,OmeGak/indico,DirkHoffmann/indico,mvidalgarcia/indico,ThiefMaster/indico,mvidalgarcia/indico,mvidalgarcia/indico,ThiefMaster/indico,indico/indico,DirkHoffmann/indico,mic4ael/indico,mic4ael/indico,pferreir/indico,indico/indico,DirkHoffmann/indico,mic4ael/indico,pferreir/indico,pferreir/indico