Generate ID Token from Access token


I’m becoming crazy, going around in circles since days. I beleive I want to achieve something simple but keep getting confused.

What I have so far :

  1. a wordpress site with the wordpress plugin activated
  2. when a user login i grab the access token via wordpress hook
  3. I can use this access token to call /userinfo and it works

Now I want to generate an ID Token for those users for a specific auth0 API.
But I don’t have username/password, I only have the access token.

Can I generate ID tokens for an API from an access token generated for a client (which has access to this api) ?

Thanks for your help

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