mopidy-spotify fail to login at startup

Hi, I'm using mopidy_spotify v4.0.1 on armbian buster on nano pi NEO SBC. I see there is an issue with spotify login when login fails on mopidy startup. For example, when there is no internet connection at mopidy startup and the internet connection comes back after couple of minutes spotify backend does not try to login again. To reproduce the issue, the connection must not come back until this log line appears:

ERROR [24188:SpotifyEventLoop] spotify.session: Spotify login error: <ErrorType.UNABLE_TO_CONTACT_SERVER: 8>

I have a solution but i'm not sure if this is correct, but at least it solves the problem for me:

diff --git a/mopidy_spotify/backend.py b/mopidy_spotify/backend.py
index 7cefb48..e4777dc 100644
--- a/mopidy_spotify/backend.py
+++ b/mopidy_spotify/backend.py
@@ -90,6 +90,16 @@ class SpotifyBackend(pykka.ThreadingActor, backend.Backend):
             self._logged_out,
             backend_actor_proxy,
         )
+        def logged_in(session, error_type):
+            if error_type is spotify.ErrorType.OK:
+                logger.error('Logged in as %s' % session.user)
+            else:
+                logger.error('Login failed: %s' % error_type)
+                session.login(
+                    self._config["spotify"]["username"],
+                    self._config["spotify"]["password"],
+                )
+        session.on(spotify.SessionEvent.LOGGED_IN, logged_in)
         session.on(
             spotify.SessionEvent.PLAY_TOKEN_LOST,
             on_play_token_lost,