ServiceCredential implementation missing for Windows 8.1

[Shaamaan]

I'm trying to create a screenshot upload mechanism for my Windows 8.1 Metro style application.

I wanted the application to upload screenshots using a service account to a specified Google Drive - it's for trouble-shooting purposes (think "report a problem" type functionality).

Sadly, it appears I cannot connect the application using a service account. I've managed to get the app to connect using OAuth, but this requires the user to specify credentials - something I don't want to do.

All documentation points to the use of the ServiceAccountCredential class. However, this class is missing from the Windows 8.1 nugget. There's a ServiceCredential class, but it's abstract and as such cannot be used.

Is this feature simply not implemented for Windows 8.1 Metro apps, or is there a trick to doing this?

[LindaLawton]

What is the exact error message you are getting?

Did you give the service account access to the Drive account you want to upload to? Other wise its just going to try to upload the files to its own drive account.

Some code would be helpful

[chrisdunelm]

This feature is currently not implemented for Windows 8.1 apps, only net45 applications.

That is, the code is in GoogleApis.Auth.PlatformServices_Shared/OAuth2/ServiceAccountCredential.cs
And not in GoogleApis.Auth.Windows/OAuth2

We are currently doing some work around platform support and auth, and may support this (no guarantee...)

[chrisdunelm]

ServiceAccountCredential is also not available in the netstandard (.NET Core) build.
This is because it uses cryptography classes (e.g. RSACryptoServiceProvider) which are not available on Windows 8.1 and Linux platforms.
To support ServiceAccountCredential on these platforms we'll need to re-implement using an alternative RSA implemented. This is almost certainly possible, but is not yet done.

[chrisdunelm]

We will not be implementing ServiceAccountCredential for Windows 8.1 apps.
As described in #787 we will be gradually phasing out active support for various older platforms, incluing Windows 8.1 apps.