Yes, so when I go on OAuth 2.0 Playground and get new tokens my app runs (using both tokens in my yml file). However, once the token expires it stops working and i'm getting the AuthenticationError.OAUTH_TOKEN_INVALID error.
Not sure if this makes a difference, but, I am keeping the `adwords_api.yml` in my apps root directory and passing as a param like this `AdwordsApi::Api.new("./adwords_api.yml")`.