token em vbnet incluido no header da requisição
Const client_id = "XXXX.apps.googleusercontent.com"
Const client_secret = "XXXXXXXXXXX"
Const refresh_token = "XXXXXXXXXX"
Const nome_aplicacao = "MinhaAplicacao"
Const user_id = "[email protected]"
Private Function CriaContactRequest(Optional scope As String = "https://www.google.com/m8/feeds https://www.google.com/m8/feeds/groups/default/full") As ContactsRequest
        Try
            Dim rs = New RequestSettings(nome_aplicacao) With { _
                            .OAuth2Parameters = New OAuth2Parameters() With { _
                            .AccessToken = refresh_token, _
                            .RefreshToken = refresh_token, _
                            .ClientId = client_id, _
                            .ClientSecret = client_secret, _
                            .RedirectUri = redirect_uri, _
                            .Scope = scope _
                        } _
                    }
            Dim cr As New ContactsRequest(rs)
            Return cr
        Catch ex As Exception
            Throw ex
        End Try
    End Function
