WP7: Store data in users live account

For storing WP7-app-data it would be great if it was possible to use the current users live account. Is this possible somehow? I guess not. The alternative is for me to setup my own server to store the data, which means I also will have to implement account-management and require the user to create a new login and password for my particular app/site. This is not very practical as the user already has a live account on the phone. A compromise would be if I could use the logged in live-account on the phone as some kind of token to validate that the logged in user is who he/she pretends to be, and then store the data on my website. Commen开发者_运维技巧ts?

This is not possible for security reasons and I wouldn't expect it to change in the foreseeable future.

Allowing applications access to a users live account and be able to interact with content there would raise all sorts of possible issues, particularly around security.
On the phone the users data is sacrosanct and you (your app) cannot interact with it without the user knowing.