Hi to all, please suggest ways to solve the following problem.

I develop Admin portal which allow to manage multiple umbraco websites. I am using Umbraco v7 for that. In addition system should provide access to admin section for each website without login from.

In my system all users saved in single DB and I plan use for this something like one time authentication token, which will be generated and passed by url when user will try navigate to some web site admin page and will be used to verify user. But how implement hidden auth form for this? Any ideas?