display useful message when no user exists in db
display useful message when no user exists in db

#209
I only added a try/except block.
LibrIT/passhport,Raphux/passhport,elg/passhport,LibrIT/passhport,elg/passhport,Raphux/passhport,LibrIT/passhport,LibrIT/passhport,LibrIT/passhport,Raphux/passhport,elg/passhport