Fetch registrations by user id

Signed-off-by: Emmy D'Anello <emmy.danello@animath.fr>

draw/consumers.py

@@ -47,7 +47,7 @@ class DrawConsumer(AsyncJsonWebsocketConsumer):
 
         # Fetch the registration of the current user
         user = self.scope['user']
-        reg = await Registration.objects.aget(user=user)
+        reg = await Registration.objects.aget(user_id=user.id)
         self.registration = reg
 
         # Accept the connection