Removed 2 sql queries, prevented race condition

allauth/account/utils.py

@@ -342,16 +342,16 @@ def sync_user_email_addresses(user):
     """
     from .models import EmailAddress
     email = user_email(user)
-    if email and not EmailAddress.objects.filter(user=user,
-                                                 email__iexact=email).exists():
-        if app_settings.UNIQUE_EMAIL \
-                and EmailAddress.objects.filter(email__iexact=email).exists():
-            # Bail out
-            return
-        EmailAddress.objects.create(user=user,
-                                    email=email,
-                                    primary=False,
-                                    verified=False)
+    if email:
+        kwargs = {'email__iexact': email}
+        defaults = {'primary': False, 'verified': False}
+
+        if not app_settings.UNIQUE_EMAIL:
+            kwargs['user'] = user
+        else:
+            defaults['user'] = user
+
+        EmailAddress.objects.get_or_create(defaults=defaults, **kwargs)
 
 
 def filter_users_by_username(*username):