Fix critical error on registration with confirmation mode (#1447)

* Ignore sync uid in case confirmable mail changed

* Update user_omniauth_callbacks.rb

* Update user_omniauth_callbacks.rb

* fix crash on devise 4.7.2+

* fix critical error on registration

allow to reflect email -> uid on creation

Author: pnghai

app/models/devise_token_auth/concerns/user_omniauth_callbacks.rb

@@ -23,8 +23,8 @@ def email_provider?
   end
 
   def sync_uid
-    if devise_modules.include?(:confirmable) && !@bypass_confirmation_postpone
-      return if postpone_email_change?
+    unless self.new_record?
+      return if devise_modules.include?(:confirmable) && !@bypass_confirmation_postpone && postpone_email_change?
     end
     self.uid = email if email_provider?
   end