attempt to fix login issue

authentication/views.py

@@ -4,6 +4,7 @@ from django.contrib.auth import authenticate
 from django.utils.decorators import method_decorator
 from django.core.exceptions import ObjectDoesNotExist
 from django.conf import settings
+from django.contrib.auth import get_user_model
 
 from rest_framework.views import APIView
 from rest_framework.response import Response
@@ -17,7 +18,7 @@ from .models import Device, LoginLog
 
 from .serializers import ChangePasswordSerializer
 
-CustomUser=settings.AUTH_USER_MODEL
+CustomUser=get_user_model()
 
 @method_decorator(csrf_exempt, name='dispatch')
 class CustomAuthToken(APIView):