Authenticate login API with user_login.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/apps/accounts/tests_user_login.py

@@ -1,5 +1,5 @@
 from django.contrib.auth import authenticate
-from django.test import TestCase
+from django.test import Client, TestCase
 
 from apps.accounts.models import User
 
@@ -21,3 +21,25 @@ class UserLoginFieldTests(TestCase):
         user = User.objects.create_user(user_login="solo", password="x")
         self.assertEqual(user.user_login, "solo")
         self.assertEqual(user.user_name, "solo")
+
+
+class LoginApiUserLoginTests(TestCase):
+    def test_login_accepts_user_login(self):
+        User.objects.create_user(
+            user_login="gm.login",
+            password="gm123",
+            user_name="gm",
+            status=User.STATUS_GM,
+        )
+        client = Client()
+        client.get("/api/v1/auth/csrf/")
+        token = client.cookies["csrftoken"].value
+        response = client.post(
+            "/api/v1/auth/login/",
+            {"user_login": "gm.login", "password": "gm123"},
+            content_type="application/json",
+            HTTP_X_CSRFTOKEN=token,
+        )
+        self.assertEqual(response.status_code, 200)
+        self.assertEqual(response.json()["user_login"], "gm.login")
+        self.assertEqual(response.json()["user_name"], "gm")