title: Use guid to register instance of xamarin forms app
body: <p>Good day fellow code ninjas,
  I am attempting to make my Xamarin forms application be device unique in the sense that you are not able to login with your credentials on any device other than the one you initially installed the application on.</p>
  <p>I have deduced that I should be using a guid for this purpose. I have searched online but I'm not able to find much of a guide on how exactly to use a guid to recognize a specific device.</p>
  <p>Are there perhaps any resources related to this or any examples of code used to accomplish this?</p>