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

    URL = "https://httpbin.org";
    URL = URL + "/get";

    Result = OPI_HTTPRequests.NewRequest()
        .Initialize()
        .SetURL(URL)
        .AddBasicAuthorization("user", "password") // <---
        .ProcessRequest("GET")
        .ReturnResponseAsJSONObject();