Propublica Api Authenticate Key With Javascript

Sorry if this is a simple question, but I'm trying to send a GET request to the ProPublica API. They gave me a key, but the documentation does not say how to authenticate with this

Solution 1:

Thanks to Amol for the reply, here is a working version that writes to the console. Make sure you have jQuery, or test it in a browser's dev tools on a site that has jQuery.

$.ajax({
         url: "https://api.propublica.org/congress/v1/members/senate/RI/current.json",
         type: "GET",
         dataType: 'json',
         headers: {'X-API-Key': 'YOUR KEY HERE'}
       }).done(function(data){
       console.log(data)
       });

Solution 2:

try to used this

$.ajax({
         url: "http://localhost/PlatformPortal/Buyers/Account/SignIn",
         type: "GET",
         dataType: 'json',
         headers: {'X-API-Key', 'PROPUBLICA_API_KEY'}
       });