It looks like https://docs.dev.to/api/#section/Authentication shows "OAuth2 authentication is still in private alpha." so hopefully could be available soon! We may be able to get on the private beta?
Replies from 3 June 2020
Back to /kind/replies/, 2020, June 2020.
Good point - this is exactly that. Allowing you to deploy to a separate URL, for instance if you were building a branch on CI.