Are you using the OpenGarage app? The latest OpenGarage app does support OTC token but it assumes the official release site (cloud.openthings.io instead of test.cloud.openthings.io), so the cloud server it’s connecting to is not the same as the beta test server. At the moment I suggest you follow the methods in:
https://tinyurl.com/otcbetadoc
to do remote access.