Unable to add user because 'application not registered on db instance'

[dimpurr]

I installed realms-wiki with pip, created a realms-wiki.json using realms-wiki setup, realms-wiki start to start service and it seems to be fine in the browser. But when I tried to create a user by command ...

realms-wiki auth create_user username user@example.com

It returned:

raise RuntimeError('application not registered on db ' 
RuntimeError: application not registered on db instance and no application bound to current context

How should I solve this problem? Thanks!