How to retrieve account details via API

After OAuth 2 flow I got a token, after that I need to get token owner details: email and name, is there an endpoint for that. 
I tried with:
- /profiles => Nothing return 
-/profiles/{account_id_that_was_returned_with_token}

One or more requested profiles were not found

Did you ever figure out the best way to do this, so that from the OAuth2.0 flow you could verify a user in your client?  Is there a "/user-info" endpoint you ended up using?  Any help would be appreciated