My app is sing page application without any server. I am using PKCE for authorization. I manage to get access token but now I want to call google api’s from it. I already linked google project with it and give the permissions but it seems the access token from PKCE is not what I need. I need Management API Access Token and then using this I can get google access token.
I don’t think it is. If you are going past the capabilities of the limited Mgmt API access available to a SPA, you probably should create an API and do the mgmt API access from the API (and the SPA calls the API of course).