Can you implement more "Sign in with..."-provider?

Hello,

can you implement more provider for “Sign in with...”-method?

I live in Switzerland, and here we have e.g. www.SwissID.ch to sign in in different online-services.

Or can you improve the “Sign in with...”-method in that way that you can use anything from the 1-password-vault. Maybe you can implement an possible option for every item in the vault like “usable as sign in with method” and than it this item would appear in the sign in with list.

Thanks a lot.