Display user name in laravel notification blade laravel 5.3

I use standard Laravel notification table. in data column i have

{"type":"New Appointment","project":"1","assign_to":"80"}

And in notification blade

 for 

This displays as

New Appointment for 80

But i want to join data['assign_to'} with User model and get user_name. Which displays as

New Appointment for John

What is the best way to use Eloquent in Laravel view

via Chebli Mohamed