title: What is the best practice to create a unique url for every user profile
body: <p>In my every application i want to create a unique url for users profile as <a href="http://app.com/username" rel="noreferrer">http://app.com/username</a> .</p>
  
  <p>I have the name of user is : 'Vijay Kumbhar' i can create <a href="http://app.com/vijay_kumbhar" rel="noreferrer">http://app.com/vijay_kumbhar</a>, but if there is another user registers with the same name then what will be better way of creating url for that user. 
   one way is to add vijay_kumbhar_1, but i dont think this is the proper way of creating a unique url </p>
  
  <p>Can you please suggest me the better way of doing this.</p>