Associate an account with Xbox Live Gamertag?

Question

How can I associate someone with a gamer tag? Basically, I want to make sure that the user actually owns this account. MLG game battles do the same when you click the link, then you are redirected to the Microsoft Xbox Live website. As soon as I log in, I am redirected back to MLG Game battles, and my account is then linked. After that, I will save the gamer tag in the database for the last link. How can I do it?

Answer 1

Link to James Comment:

* OAuth 2.0

Live Connect implements OAuth 2.0 protocol for user authentication. This section describes the authorization flows that Live Connect uses and the supported extension options. In this section, we assume that you are familiar with the terminology of OAuth 2.0 and OAuth. If you are new to OAuth, we recommend that you first check the OAuth 2.0 specification or refer to it when you come across an unfamiliar term or idea.
Source https://msdn.microsoft.com/en-us/library/hh243647.aspx (fix from September 13, 2016)

If you read your documentation, I’m sure that you can get finer details and execute it in the project.