OpenIntegrations/docs/en/examples/HTTPClient/AddOAuthV1Authorization.txt

    URL = FunctionParameters["HTTP_URL"];
    URL = URL + "/get";

    Token       = "***";
    Secret      = "***";
    UsersKey    = "***";
    UsersSecret = "***";
    Version     = "1.0";

    Result = OPI_HTTPRequests.NewRequest()
        .Initialize(URL)
        .AddOAuthV1Authorization(Token, Secret, UsersKey, UsersSecret, Version) // <---
        .ProcessRequest("GET")
        .ReturnResponseAsJSONObject();