migrations run for lyric models; authentication & views & their tests now account more fully for uuid over email as pk

src/apps/lyric/authentication.py

@@ -15,9 +15,9 @@ class PasswordlessAuthenticationBackend:
         except User.DoesNotExist:
             return User.objects.create(email=token.email)
 
-    def get_user(self, email):
+    def get_user(self, user_id):
         try:
-            return User.objects.get(email=email)
+            return User.objects.get(pk=user_id)
         except User.DoesNotExist:
-            return None # might also just pass (which = return None)
+            return None # could also pass (which = return None)