TypeError at /auth/
authenticate() missing 1 required positional argument: 'request'

{
    "username": "HelloUser",
    "password": "Hello123"
}

@csrf_exempt
@api_view(['POST'])
def authenticate(self, request):
    print(request.data)
    user = authenticate(username=request.data['username'], password=request.data['password'])
    if user is not None:
        return Response({'Status': 'Authenticated'})
    else:
        return Response({'Status': 'Unauthenticated'})

urlpatterns = [
    url(r'^', include(router.urls)),
    url(r'create/', views.create),
    url(r'retrieve/', views.retrieve),
    url(r'auth/', views.authenticate),
    url(r'^api-auth/', include('rest_framework.urls', namespace='rest_framework'))
]