oauth-apps-for-windows | OAuth for Apps : Samples for Windows | OAuth library

I've followed a sample created here:

https://github.com/googlesamples/oauth-apps-for-windows/blob/master/OAuthDesktopApp/README.md

to have Google OAuth work with my desktop application and it seems I got stuck with redirect URIs. I know I have to provide a RedirectURI on Google Credentials page (in Developers Console), but I cannot figure out how to provide a RedirectURI to accept any port number.

In this sample, a local HTTP server opens a connection on localhost (127.0.0.1) and it seems to work, no matter which port is used for listening (it finds some random port and then sends RedirectURI as localhost:randomport) and authentication works as expected. However, when I try to do that in my application, I get notification that RedirectURI is not defined. Is there any special syntax to be used when defining RedirectURI inside Developer Console?

Using the OAuthDesktopApp example posted here: https://github.com/googlesamples/oauth-apps-for-windows , and converted to vb.net, there is a line of code which reads:

I know this is a very basic question, but I'm creating a browser in wpf (I'm almost done with it) using CEFSharp, but I hit a snag with logging into google on some accounts. I get a "This browser or app may not be secure." message. Now, I've researched using OAuth to get a token for accessing and using certain features of Google, but not just how to log in as a whole. I just want the user to be able to log into Google, just like they would on a Chrome browser (without the Sync option, of course).

I registered my application with Google Console, and received a ClientId and ClientSecret, and I created a window to be called when the sign-in button is clicked on the google page that tries to get the token, but when the user types in their e-mail, they get the same message (See Below).

I'm not sure if there's an API that I can use or something that can let my user login to google through my browser without having to call the Google Chrome browser itself, because that defeats the purpose of my browser being self-sufficient. I've been beating my head on this for days. Can anyone help?

Below is the xaml for my Google Login window:

I am writing a windows desktop application with External Authentication(Google, Facebook) in C#.

I'm using HttpListener to allow a user to get Barer token by External Authentication Service with ASP.NET Web API, but administrator privileges are required for that and I want run without admin mode.

My reference was Sample Desktop Application for Windows.

Is this the best practice for external authentication provider from C#? Or is there another way to do that?

This is my code to get Barer token by external provider:

To start - I have taken the sample UWP app provided by Google here (https://github.com/googlesamples/oauth-apps-for-windows/tree/master/OAuthUniversalApp).

I have this successfully working with my own clientID (which the setup was documented in the answer here: How to create a custom OAuth 2.0 redirect_uri for Google provider, for UWP app?). The redirect back into the app works fine - and is fired from the OnNavigatedTo() method in the sample.

I then have an UWP that logs temperature from a sensor (which will eventually run on a Raspberry Pi) - but for now I'm running this on normal Windows 10. I have copied the Oauth bits from the sample into my project - and also declared the protocol in the Package.appxmanifest using the name "pw.oauth2" (the same as the sample and also matches what I have in the Google Developer Console).

When I launch the app and click the "Sign in with Google" it successfully launches the browser, requests authorizations/sign-in, and redirects back to the app. I know this part is working because it brings the app back to the foreground. However the OnNavigatedTo() method is not firing when returning to my app.

I've search and read the documentation for this - but am unable to get that method to fire in my app. I feel like I missing something else that was setup in the sample app that I have not configured in my app. Any help or suggestions is appreciated!

Here is my XAML:

Background on my login flow:

I'm creating a C# WPF Application which will be distributed to an end-user.

On my Website, I'm using FirebaseUI Auth to do the login authentication so that the user can log in with Google, Facebook or Email.

When the user initiates a log into the Application, it transfers the user over to the Website temporarily which mints a custom JWT token on the server which is returned to the Website then -> Application and then Application then uses to the freshly minted JWT token to Authenticate with FirebaseAuthentication.net to generate a Firebase auth token. This works great for connecting to Firebase REST API's like Firestore to obtain user information on client Application.

The Problem: Not only do I want to connect to the Firebase API's, but to the Google Cloud Speech API as well (in this case Speech-To-Text). I don't believe the Firebase auth token is sufficient to achieve this. I can verify the user and access their Firebase data on the server or the client, yet this is insufficient to connect to the Google Speech-To-Text API. In Google's examples using the client credentials first requires obtaining an auth-code from their authorization endpoint. In Google's Windows Application OAuth Example This is the https://accounts.google.com/o/oauth2/v2/auth authorization endpoint.

Theorizing creates another potential question which could sooner answer the question: Could I use my FirebaseUI Auth page as an OAuth Endpoint to somehow authenticate my End-User Application with Google to connect to the Google Speech-to-Text API instead of using the https://accounts.google.com/o/oauth2/v2/auth endpoint?

The Question: How do I access the Google Cloud Speech-To-Text API from an end-user Application after authenticating them with Firebase Auth?

Google's reference for how to authenticate as an end-user: https://cloud.google.com/docs/authentication/end-user