message: Fixed KeyError by making kwarg explicit
diff: @@ -2793,7 +2793,7 @@ class Superset(BaseSupersetView): # pylint: disable=too-many-public-methods
  .scalar()
  )
  if welcome_dashboard_id:
  - return self.dashboard(str(welcome_dashboard_id))
  + return self.dashboard(dashboard_id_or_slug=str(welcome_dashboard_id))
  payload = {
  "user": bootstrap_user_data(g.user),
  