Make --default-group-provider argument required
Make --default-group-provider argument required

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