feat(api): split api into multiple apps (#1626)

Fixes #1622

- split the api into 4 apps: core, history, schedule, storage
- exploded the settings into testing/prod

api/libretime_api/core/tests/models/test_user.py

@@ -0,0 +1,46 @@
+from django.apps import apps
+from rest_framework.test import APITestCase
+
+from ....permission_constants import GROUPS
+from ...models import DJ, GUEST, User
+
+
+class TestUserManager(APITestCase):
+    def test_create_user(self):
+        user = User.objects.create_user(
+            "test",
+            email="test@example.com",
+            password="test",
+            type=DJ,
+            first_name="test",
+            last_name="user",
+        )
+        db_user = User.objects.get(pk=user.pk)
+        self.assertEqual(db_user.username, user.username)
+
+    def test_create_superuser(self):
+        user = User.objects.create_superuser(
+            "test",
+            email="test@example.com",
+            password="test",
+            first_name="test",
+            last_name="user",
+        )
+        db_user = User.objects.get(pk=user.pk)
+        self.assertEqual(db_user.username, user.username)
+
+
+class TestUser(APITestCase):
+    def test_guest_get_group_perms(self):
+        user = User.objects.create_user(
+            "test",
+            email="test@example.com",
+            password="test",
+            type=GUEST,
+            first_name="test",
+            last_name="user",
+        )
+        permissions = user.get_group_permissions()
+        # APIRoot permission hardcoded in the check as it isn't a Permission object
+        str_perms = [p.codename for p in permissions] + ["view_apiroot"]
+        self.assertCountEqual(str_perms, GROUPS[GUEST])