[FIX] Get Export API URL when no api key
[FIX] Get Export API URL when no api key

- Change the type of exception raised

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