this.store.peekAll() and firstObject

Let's assume following code of route:

model() {
  return this.store.peekAll('user');
}

and simple template:

I would like to push that firstObject part into model because I always want to use only first record. With Ember objects it should be possible to use:

return this.store.peekAll('user').get('firstObject')

but this is not working because peekAll does not return Ember object in such way. What is the correct way of doing this?

[*] I'm using peekAll() instead of peekRecord() because peekRecord does not update when data in store are changed.