Configuring OAuth2 with RestSharp

I’m looking to set up a test against the Vimeo API and have been using some of the RestSharp tests to set me up. However, since these test were written Vimeo now requirs OAuth2 rather than OAuth1.

I’m having difficulty trying to find resources online advising how I might be able to set up OAuth2 for my test. Based on the below code could someone advise on how I’d need to refactor my code to be able to run the
test successfully(NB-I’m aware that I’m using “OAuth1Authenticator”, which is what was originally there)

public void Can_Query_Vimeo()
        const string consumerKey = "?????";
        const string consumerSecret = "?????";

        // arrange
        var client = new RestClient
            BaseUrl = new Uri(""),
            Authenticator = OAuth1Authenticator.ForRequestToken(consumerKey, consumerSecret)
        var request = new RestRequest();

        request.AddParameter("format", "json");
        request.AddParameter("method", "");
        request.AddParameter("query", "weather");
        request.AddParameter("full_response", 1);

        // act
        var response = client.Execute(request);

        // assert
        Assert.AreEqual(HttpStatusCode.OK, response.StatusCode);

Could you create some sort of method that uses request.AddHeader rather than Authenticator? Not sure if these links help: