Revoke the access token supplied by āaccess-token, FLY_ACCESS_TOKEN, or
FLY_API_TOKEN, including all tokens in a token bundle. Uses āaccess-token first,
then FLY_ACCESS_TOKEN, then FLY_API_TOKEN. An explicitly empty FLY_ACCESS_TOKEN
prevents FLY_API_TOKEN from being selected.Use āfly auth logoutā to revoke the access token saved by āfly auth loginā.Does not clear local configuration or unset environment variables.