Hi,
The project I have in developer console is a "Service Account". I am 
getting the following exception while executing this .Net code to grant 
access to AdWords API, the exception happened at the last line of my code. 
Can you help me point out what I am missing? I am coding with v201406 .Net 
API library.  Thanks

Failed to get access token for service account.
{
  "error" : "invalid_grant"
}

Sub GetToken()
        Private config As AdWordsAppConfig
        Private user As AdWordsUser

        user = New AdWordsUser()
        config = user.Config

        config.OAuth2ClientId = {The Client ID from Project -> Credentials 
-> CLIENT ID}
        config.OAuth2ServiceAccountEmail = {email address of my account}
        config.OAuth2PrnEmail = {The Client ID from Project -> Credentials 
-> EMAIL ADDRESS}
        config.DeveloperToken = {My developer Token}
        config.OAuth2CertificatePath = {Local file path to my p12 
certificate, download from console when I created my P12 key}
        config.OAuth2CertificatePassword = "notasecret"
        config.OAuth2Mode = OAuth2Flow.SERVICE_ACCOUNT
        config.AuthorizationMethod = AdWordsAuthorizationMethod.OAuth2
        user.Config.OAuth2Scope = "https://adwords.google.com/api/adwords/";

        Dim auth As New OAuth2ProviderForServiceAccounts(config)
        Dim rpt As ReportDefinitionService = 
user.GetService(AdWordsService.v201406.ReportDefinitionService)
        auth.GenerateAccessTokenForServiceAccount()
End Sub

Thank you

Aroma

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