ODA does not persist accessToken, YML needs logic to save?

Summary

ODA does not persist accessToken, YML needs logic to save?

Content

I was expecting, ODA to persists the accessToken though realized, it does not, system component OAuth2 would get the accessToken then if we need to persist perhaps we need to put logic in Bot YML, is this correct understanding or I am missing some concepts? 

Given ODA does not... is user profile a logical option to save the accessToken?