1- You can SSH on a GAE Flex instance for debugging purposes by going to your Console > App Engine > Instances > Select SSH on the selected instance.
2- Since the last possible solution offered is not feasible for you, can you detail why would you want to "createsuperuser" on the first place. If your intention is to create a "power user", you can create a root level user on your DB like this StackOverflow thread <https://stackoverflow.com/questions/35153942/how-to-run-django-management-commands-against-google-cloud-sql/35173006#35173006>. If you want a "grant all" permission, this will not work because Cloud SQL does not support "super" privileges as documented here <https://cloud.google.com/sql/faq#grantall>. 3- In addition to #2, provide the versions of your Django, Cloud SQL, and Google Cloud SDK. -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to google-appengine+unsubscr...@googlegroups.com. To post to this group, send email to firstname.lastname@example.org. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/974058b6-c89d-4003-a713-9ded6f80e91b%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.