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Editorial Team
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Asked: 2026-05-23T07:14:29+00:00

I am adding Twitter and Facebook login to a MVC 3 test application using

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I am adding Twitter and Facebook login to a MVC 3 test application using TweetSharp and Facebook C# SDK.

Currently when a user signs in using Twitter I create a user account for that user in a user table and store the id, token, and token secret in a separate table with a foreign key to the user table. Since the id, token and token secret do not expire I can quickly locate the right user account when the user logs in next time using Twitter.

What if the very same user logs in using Facebook next time? Since Twitter does not provide email in their API and I therefore have no common piece of information to tie a user account to either Twitter or Facebook I assume I have to create a new user account for a Facebook login? Does anyone have any experience with this? Are there any ways to solve this?

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  1. Editorial Team

    Not really a solution, more of a work around. I was faced with the same problem and ended up forcing the user to complete thier account profile by asking for their email address before allowing them to proceed any further. This meant that if the email address coming back with the Facebook auth matched the email address created with the twitter signin then I didn’t need to create another account.

    The bigger difficulty was coming the other way, if the account was created by the facebook auth first. It meant an untidy marry up of accounts.

    To be honest the information we got from allowing users to sign in with twitter was not worth the effort and in the end finished up only allowing Facebook auths. I’m not sure how important twitter is to your solution.

    Not the perfect answer I know, but I thought I would share my experience.

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