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

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