Update app.py

app.py

@@ -28,9 +28,12 @@ def log_to_spotify():
         if sp != None:
             legit_genres = sp.recommendation_genre_seeds()['genres']
             st.session_state['login'] = (sp, user_id, legit_genres)
+            st.success('You are logged in.')
+        else:
+            legit_genres = None
     else:
         sp, user_id, legit_genres = st.session_state['login']
-    st.success('You are logged in.')
+        st.success('You are logged in.')
     return sp, user_id, legit_genres