[ADD] sentinel user and migrate fleetactivitytracking

allianceauth/framework/api/user.py

@@ -0,0 +1,15 @@
+"""
+Alliance Auth User API
+"""
+
+from django.contrib.auth.models import User
+
+
+def get_sentinel_user() -> User:
+    """
+    Get the sentinel user or create one
+
+    :return:
+    """
+
+    return User.objects.get_or_create(username="deleted")[0]

allianceauth/framework/tests/test_sentinel_user.py

@@ -0,0 +1,47 @@
+"""
+Test sentinel user
+"""
+
+# Django
+from django.contrib.auth.models import User
+from django.test import TestCase
+
+# Alliance Auth
+from allianceauth.framework.api.user import get_sentinel_user
+
+
+class TestSentinelUser(TestCase):
+    """
+    Tests for the sentinel user
+    """
+
+    def test_should_create_user_when_it_does_not_exist(self) -> None:
+        """
+        Test should create a sentinel user when it doesn't exist
+
+        :return:
+        :rtype:
+        """
+
+        # when
+        user = get_sentinel_user()
+
+        # then
+        self.assertEqual(first=user.username, second="deleted")
+
+    def test_should_return_user_when_it_does(self) -> None:
+        """
+        Test should return sentinel user when it exists
+
+        :return:
+        :rtype:
+        """
+
+        # given
+        User.objects.create_user(username="deleted")
+
+        # when
+        user = get_sentinel_user()
+
+        # then
+        self.assertEqual(first=user.username, second="deleted")