Implementing app authentication with client secret in Runtime SDK 200.7

[azlotin]

I have the following working Runtime SDK 100.x code implements application authentication:

ServerInfo serverInfo = new ServerInfo
{
ServerUri = new Uri(SERVER_URL),
TokenAuthenticationType = TokenAuthenticationType.OAuthClientCredentials,
OAuthClientInfo = new OAuthClientInfo { ClientId = CLIENT_ID, ClientSecret = CLIENT_SECRET, RedirectUri = new Uri(REDIRECT_URL) }
};

AuthenticationManager.Current.RegisterServer(serverInfo);
AuthenticationManager.Current.OAuthAuthorizeHandler = new OAuthAuthorize();
AuthenticationManager.Current.ChallengeHandler = new ChallengeHandler(CreateCredentialAsync);

As OAuthClientInfo is obsolete at 200.7, I have rewritten this as:

ServerInfo serverInfo = new ServerInfo(new Uri(SERVER_URL))
{
TokenAuthenticationType = TokenAuthenticationType.OAuthClientCredentials,
};

AuthenticationManager.Current.RegisterServer(serverInfo);
var userConfig = new OAuthUserConfiguration(new Uri(SERVER_URL), CLIENT_ID, new Uri(REDIRECT_URL));
AuthenticationManager.Current.OAuthUserConfigurations.Add(userConfig);
AuthenticationManager.Current.OAuthAuthorizeHandler = new OAuthAuthorize();
AuthenticationManager.Current.ChallengeHandler = new ChallengeHandler(CreateCredentialAsync);

How do I include Client Secret here so the users are not getting the authentication prompt? I understand I should be using OAuthApplicationCredential, but I cannot figure out how.

Thanks!

[PreetiMaske]

Here is the detailed blog post that explain usage of new auth APIs and how to best use them

https://www.esri.com/arcgis-blog/products/sdk-net/developers/new-auth-apis-for-dotnet-sdk

Please give this a read, especially `Configuring OAuth` section that particularly talks about OAuth. For OAuth app authentication, pass client ID and client secret directly to OAuthApplicationCredential.CreateAsync.

Hope this helps,

Thanks

[dotMorten_esri · Accepted solution]

To add to Preeti's answer, ALL of the above code can be replaced with 

AuthenticationManager.Current.AddCredential(await OAuthApplicationCredential.CreateAsync(SERVER_URL, CLIENT_ID, CLIENT_SECRET));

When using an app credential added up front, there's no need for messing with server infos, oauth configs, credential callbacks etc. Just the above line before accessing your server.

[azlotin]

Thank you both for the prompt answers!