Setting auth0 session in next server code (auto login)

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Hello,
we have a slightly different flow for first time users in our app and would like to get help with how to do the login correct. the flow we have:

  1. the user installs our app via a some marketplace (where he is authenticated there, and we trust that he is authenticated)
  2. when installation is done, the marketplace redirects the user into our backend api
  3. we generate the user in our DB and also use auth0 sdk (python) to signup the user into our auth0 connection (we use DB in auth0)
  4. we use the auth0 sdk to make a login for this user (still in the backend code)
  5. then we would like to set the cookie\session and redirect the user into our webapp home page (next js client)
  6. we expect that at this point the user will be considered as logged in. we use the next-auth0 client withMiddlewareAuthRequired that enforces authenticated user at all routes.

what we struggle with is steps 5 & 6, where we couldn’t find a way to convert the login response we get from the server (access_token, id_token, token_type) into a valid auth0 session in a way that the middleware will identify.
any help is much appreciated

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