def _login_callback(user_tuple, conn, trans=None):
if user_tuple is not None:
try:
cu = ConnectedUser(user_tuple, conn)
except ValueError:
# this user is already logged in
conn.send(UserError.user_is_already_logged_in(), trans)
return
conn.data['authenticated'] = True
conn.data['user'] = cu
cu.enterRoom(conn.factory.main_room)
response = UserOk.login()
else:
response = UserError.login_failed()
conn.send(response, trans)
