Throw if user_db is not provided.
Throw if user_db is not provided.

Plexxi/st2,StackStorm/st2,nzlosh/st2,nzlosh/st2,StackStorm/st2,tonybaloney/st2,nzlosh/st2,tonybaloney/st2,Plexxi/st2,StackStorm/st2,tonybaloney/st2,Plexxi/st2,Plexxi/st2,nzlosh/st2,StackStorm/st2