Add Steam provider

[aspnet-contrib]

Add Steam provider

[kevinchalet]

Thanks for the suggestion!

OAuth2 providers are definitely our main priority, but I'll make sure to upload a working OpenID 2.0 base handler as soon as possible. Implementing specific providers like Steam should be far easier with a common design.

/cc @jerriep

[kevinchalet]

FYI, I almost finished the first prototype of the OpenID 2.0 base handler and it works fine with Steam.

I'll probably send a PR tomorrow and ask @jerriep to take a look 😄

[jerriep]

Cool :) I'll be travelling quite a bit though for the next 4 days, but should be able to fit in something inbetween

[kevinchalet]

@Akira-Webster the Steam provider is done, but I'd like to test it. Could you please create an API key and share it?
You can join https://gitter.im/aspnet-contrib/AspNet.Security.OpenId.Providers and send it via PM if you prefer.

[Akira-Webster]

@PinpointTownes below is one of my development keys it will be revoked in 10 days. Please let me know if you need longer then that.

D929B1E7DFCC5FABB23DE7969F813E5E

[kevinchalet]

Thank you, that was really helpful 😄

If you're interested in testing the early bits of the Steam provider, you can take a look at this sample: https://github.com/PinpointTownes/AspNet.Security.OpenId.Providers/tree/sample

Don't hesitate to brutalize it but please don't use it for a production app 😄
Feel free to share your remarks and criticisms.