Refresh Token not getting generated

[davidh07]

Describe the bug:
Using the code from https://github.com/googleads/google-ads-dotnet/tree/main/Google.Ads.GoogleAds/examples/Authentication/GenerateUserCredentials
I am not getting the RefreshToken: Here is the results of Token Value after UserCredential credential = task.Result;
Name Value Type
AccessToken "Hidden Value XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX" string
ExpiresInSeconds 3599 long?
IdToken null string
Issued {6/30/2022 9:08:46 PM} System.DateTime
IssuedUtc {7/1/2022 2:08:46 AM} System.DateTime
RefreshToken null string
Scope https://www.googleapis.com/auth/adwords string
TokenType "Bearer" string

Steps to Reproduce:
Please provide a code snippet or steps to consistently reproduce the experienced behavior.
[DO NOT INCLUDE ANY PERSONAL OR SENSITIVE DATA IN YOUR SUBMITTED CODE]

Expected behavior:

Client library version and API version:
Client library version: Latest Copy of code from https://github.com/googleads/google-ads-dotnet/tree/main/Google.Ads.GoogleAds/examples/Authentication/GenerateUserCredentials
Google Ads API version: Latest
.NET version: 4.8
Operating system (Linux, Windows, ...) and version (if the bug is platform-specific): Windows

Request/Response Logs:

Anything else we should know about your project / environment

[AnashOommen]

@davidh07 I am fairly sure this is the same problem as the one in #332.

Try modifying the code example like this:

var initializer = new GoogleAuthorizationCodeFlow.Initializer
{
    ClientSecrets = secrets,
    Prompt = "consent",
};


// Authorize the user using desktop flow. GoogleWebAuthorizationBroker creates a
// web server that listens to a random port at 127.0.0.1 and the /authorize url
// as loopback url. See https://github.com/googleapis/google-api-dotnet-client/blob/main/Src/Support/Google.Apis.Auth/OAuth2/LocalServerCodeReceiver.cs
// for details.
Task<UserCredential> task = GoogleWebAuthorizationBroker.AuthorizeAsync(
    initializer,
    new string[] { GOOGLE_ADS_API_SCOPE },
    string.Empty,
    CancellationToken.None,
    new NullDataStore()
);
UserCredential credential = task.Result;

[AnashOommen]

This was fixed in 13.0.0.