Do I need a dev token to access AdWords API via OAuth?
I am trying to get an access to AdWords API via OAuth. I registered an app, created MCC account (to a different e-mail) and a test account. I read through AdWords API documentation and don't see that I need a dev token to access an account by oauth. Just clientId, clientSecret and accessToken. But when I try to connect to the API using google-api-adwords-dotnet library. I get "Parameter name: AdWords API requires a developer token" What is the purpose of OAuth if I cant access the API without MCC and dev token? Best regards, Andrei P.S. I can access my test account providing my dev token. But