oAuth2.0 error: Credential could not be refreshed........ client.auth.oauth2.TokenResponseException: 400 Bad Request , "error" : "invalid_grant"

[Echo Li]

Hi Gurus,

I was trying to upgrade to oAuth2 authentication from ClientLogin method, when I run the sample code I got below errors, have no clue what caused it, is it possible that the way I create the "clientID" and "ClientSecret" caused it?  any reply is appreciated.....

Exception in thread "main" com.google.api.ads.common.lib.exception.OAuthException: Credential could not be refreshed.
        at com.google.api.ads.common.lib.auth.OfflineCredentials.generateCredential(OfflineCredentials.java:149)
        at DownloadCriteriaReportWithAwql.main(DownloadCriteriaReportWithAwql.java:42)
Caused by: com.google.api.client.auth.oauth2.TokenResponseException: 400 Bad Request
{
  "error" : "invalid_grant"
}
        at com.google.api.client.auth.oauth2.TokenResponseException.from(TokenResponseException.java:105)
        at com.google.api.client.auth.oauth2.TokenRequest.executeUnparsed(TokenRequest.java:332)
        at com.google.api.client.auth.oauth2.TokenRequest.execute(TokenRequest.java:352)
        at com.google.api.client.auth.oauth2.Credential.executeRefreshToken(Credential.java:535)
        at com.google.api.client.googleapis.auth.oauth2.GoogleCredential.executeRefreshToken(GoogleCredential.java:248)
        at com.google.api.client.auth.oauth2.Credential.refreshToken(Credential.java:454)
        at com.google.api.ads.common.lib.auth.OAuth2Helper.callRefreshToken(OAuth2Helper.java:70)
        at com.google.api.ads.common.lib.auth.OfflineCredentials.generateCredential(OfflineCredentials.java:144)


Echo

[Takeshi Hagikura (AdWords API Team)]

Hi,

I guesss, it's because the account you granted access to AdWords and the account you were trying to make a request against are different (or not under the MCC you granted access).

Please make sure you grant access to an MCC account or a client account. 

And the account you are trying to make a request is under the MCC or the client account you granted access.

Best,

- Takeshi, AdWords API Team

[test...@idilia.com]

I had the exact same error message and solved the problem. What I was doing wrong is the following:

When using GetRefreshToken and copying the url in the browser I was copying the code (starting by 4/) obtained by this page as the refreshToken in ads.properties, instead of copying this code back into the (GetRefreshToken) console and using as a refreshToken the one generated by GetRefreshToken (starting by 1/).

I should have paid more attention to the instructions !

[Josh Radcliff (AdWords API Team)]

Hi Echo,

If the prior post doesn't solve the issue, please see the following discussion, which covers many of the common issues and questions around configuring your app for OAuth 2.

https://groups.google.com/d/msg/adwords-api/-K7DuDOAVEM/9Um-qE4Di3AJ

Cheers,

Josh, AdWords API Team