Fix FB auth with present in db email

apps/auth/views.py

@@ -151,17 +151,21 @@ class FacebookLoginOrRegistration(View):
                                      "errors": {"email": 'is field required'}
                                      })
             else:
-                first_name = data.get('first_name', '')
-                last_name = data.get('last_name', '')
-
-                user = User.objects.create_user(username=email, email=email, first_name=first_name, last_name=last_name, password=uuid4().hex)
-                user.is_email_proved = True
-                user.fb_id = fb_id
-                if photo_data:
-                    photo = ContentFile(photo_data)
-                    fname = str(fb_id) + '.jpg'
-                    user.photo.save(fname, photo, save=True)
-                user.save()
+                try:
+                    user = User.objects.get(email=email)
+                except User.DoesNotExist:
+                    first_name = data.get('first_name', '')
+                    last_name = data.get('last_name', '')
+
+                    user = User.objects.create_user(username=email, email=email, first_name=first_name, last_name=last_name, password=uuid4().hex)
+                    user.is_email_proved = True
+                    user.fb_id = fb_id
+                    if photo_data:
+                        photo = ContentFile(photo_data)
+                        fname = str(fb_id) + '.jpg'
+                        user.photo.save(fname, photo, save=True)
+                    user.save()
+
                 login(requests, user=user)
                 return JsonResponse({"success": True})
         else: