astroanu said:

From Larave 5 and up you need "use" every class, including models by their namespace.

....
use Models/Follow;

class User {
   ....
   ....

   public function follow() {
           return $this->hasMany('Follow');
   }
}

you can also define return $this->hasMany('Follow'); as return $this->hasMany(Follow::class);

Class 'Models\Follow' not found it still can't see the class. Shown path is right, but stil..

Okay, solution was as @astroanu said. Every class what User model used, I added like:

use Events\Models\Follow;

and method to return:

public function follow() {
	return $this->hasMany(Follow::class);
}