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1. Request to Authorize endpoint starts any interaction with end user (if requried)
2. Response from Authorize endpoint after successful authentication of end user. Session is in pending state until authorization code is exchange with tokens. Exchange of code must happen before code expiry (4)
3. Request/response to Token endpoint to exchange authorization code with original set of tokens (ID Token, Access Token, Refresh Token). Session is in active state in a forward session window until expiry of ID- and Access Tokens (5). Session must be refreshed before expiry of original refresh token (8)
4. Authorization code expires
5. Original ID- and Access Tokens expire. Session is in inactive state until session is refreshed with a new set of tokens. 
6. Request/response to Token endpoint to refresh session with new set of tokens (ID Token , Access Token , Refresh Token). Session is in active state until expiry of new ID- and Access Tokens. Session must be refreshed before expiry of new refresh token (9)
7. New ID- and Access Tokens expire. Session is in inactive state until session is refreshed again. 
8. Session would end if it was not refreshed
9. Session ends because it is not refreshed again before expiry of new refresh token.

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