ApiUrl           = "https://3100.api.green-api.com/v3";
    MediaUrl         = "https://3100.api.green-api.com/v3";
    IdInstance       = "31003...";
    ApiTokenInstance = "17915d8e0b4b4975a183478da...";

    PhoneNumber = 441234567890;

    AccessParameters = OPI_GreenMax.FormAccessParameters(ApiUrl, MediaUrl, IdInstance, ApiTokenInstance);
    Result           = OPI_GreenMax.GetAuthorizationCode(AccessParameters, PhoneNumber);