Access Denied OAuth 2.0 Google Adwords

Access Denied OAuth 2.0 Google Adwords

I am using a console application I am not able to authenticate the Oauth
2, it's access denied, is there any way to get authentication on console
application project without accessing the url? because my code console
will turn a windows service.
Follow the example of my code:
AdsOAuthProviderForApplications oAuth2Provider =
(user.OAuthProvider the AdsOAuthProviderForApplications);
oAuth2Provider.RedirectUri = null; oAuth2Provider.RefreshToken =
"1/3R_SwvsHk4sFg01RTlSVNmBx8sR7okB7NmBrefvG81E";
oAuth2Provider.RefreshAccessTokenInOfflineMode ();
Thanks