new apps.lyric.authenticate model PasswordlessAuthenticationBackend and authenticate() function help determine Token authenticity, login to existing accounts, or create new ones; associated .tests.test_authentication class asserts this functionality; apps.lyric.models & .tests.models now handles token uid instead of id, completing the transition away from email-as-pk

src/apps/lyric/tests/test_models.py

@@ -1,3 +1,4 @@
+import uuid
 from django.contrib import auth
 from django.test import TestCase
 from ..models import Token, User
@@ -16,6 +17,7 @@ class UserModelTest(TestCase):
 
 class TokenModelTest(TestCase):
     def test_links_user_with_autogen_uid(self):
-        token1 = Token.objects.create(id="123")
-        token2 = Token.objects.create(id="124")
-        self.assertNotEqual(token1.uid, token2.uid)
+        token1 = Token.objects.create(email="a@b.cde")
+        token2 = Token.objects.create(email="v@w.xyz")
+        self.assertNotEqual(token1.pk, token2.pk)
+        self.assertIsInstance(token1.pk, uuid.UUID)