How to get the number of points for a user from another table via his steamid?

Question

Laravel

There is a users table and the steam2 field in it (the user's steamid is stored in it)
There is a Store table, in it the steamid is stored in the auth field. There is also a 3rd field, (points) it stores user points.
I read the information on the internet but everyone writes differently. In the end, I got confused.
The only thing I understood:

public function Store()
    {
        return $this->hasOne(Store::class);
    }

public function User_shop()
    {
        return $this->hasOne(User::class);
    }

Therefore, please help me write the code, I need to get the number of user points through steamid.