Misago/misago/emberapp/app/routes/user.js

import MisagoRoute from 'misago/routes/misago';

export default MisagoRoute.extend({
  usingUrlName: true,

  model: function(params) {
    var urlName = this.getParsedUrlNameOr404(params.url_name);
    return this.store.find('user', urlName.id);
  }
});