Snippet to authenticate a user and query MyUSA profile.\

gistfile1.js

$(function() {
    OAuth.initialize('public key');

    $('.login').click(function(e) {
      e.preventDefault();
      OAuth.popup('myusa', function(error, result) {
        $.ajax({
            url: 'http://my.usa.gov/api/profile?access_token='+result.access_token,
            headers: { 'Authorization': "Bearer "+result.access_token },
            success: function(data) {
              console.log("result",data);
            },
            type: 'GET'
        });
        
      });
    });

  
  
});