gmail oauth2 got stuck

Anyone tried to connect to gmail imap using email and access-token?
It simply go dead on me. Tried a couple days, nothing worked.
I simply use the example code.
It dies on client.Authenticate("XOAUTH2", @Gmailauth)

Who had any success? by the way, I use runtime-tokio feature.

Start by reproducing the Gmail IMAP example with the runtime-tokio feature and inspect the failure at client.Authenticate("XOAUTH2", @Gmailauth). Check whether the email and access-token format matches Gmail's XOAUTH2 requirements. Done means identifying the cause and making authentication work or documenting the incompatibility and required configuration.

Written by the indexing model from the issue text.