NoMethodError (super: no superclass method `create_token' for #<User:0x000055b9ceeeac68>)

Hi. I got a a error ```NoMethodError (super: no superclass method `create_token' for #)```.
My code:
```
def create_token(client: nil, lifespan: nil, cost: nil, **token_extras)
super
end
```
Ruby version: 2.6.3
Rails version: 6.0.2.1
Gem version: 1.1.3

Begin with the reported create_token override under Ruby 2.6.3, Rails 6.0.2.1, and gem 1.1.3, then inspect the gem's token-creation path to determine why super has no target. Done requires a reproducible diagnosis and an agreed fix or documentation, but the issue supplies no file, test, or acceptance criterion.

Written by the indexing model from the issue text.