Accessing Params In Template EmberJS

In my router, I have

 this.route('tends', { path: '/tends' }, function() {
    this.route('user', { path: ':usern' });
  });

How do I access, the :usern value in my template?

For example, I have tried

{{params.usern}}

and

{{usern}}

Unfortunately, neither of these approaches work.

Note: My template is for a route such as tends/usern_here_please and I want the value of usern_here_please.