Great questions - DailyCred does the account linking, so if someone signs up with email, and then later Facebook, the accounts are linked. You can also explici

Great questions - DailyCred does the account linking, so if someone signs up with email, and then later Facebook, the accounts are linked. You can also explicitly connect users to multiple to services, for ex if you want to have them add their Twitter account after they're logged in. We do both normalizing the common data, and returning the raw info/access tokens for the social provider. So if you just need the user's name you can grab that from us, but if you want some data that's unique to FB you can still access all of that. We look after maintaining these social tokens for you. Yay - we win the lottery! Or another scenario, you decide to roll your own later.. We store passwords using standard (non-proprietary) bcrypt hashes so you can implement your own auth system if you like. And social permissions are granted to your Facebook/Twitter/Google apps, so you own that connection to your user too. We're basically a proxy in the middle that handles the glue between all the providers.