Laravel relation with composite key

LaravelCompositeKeyExample.php

    public function account(): BelongsTo
    {
        return new BelongsTo(
            Account::where('owner_id', $this->owner_id),
            $this,
            'owner_type',
            'owner_type',
            'BelongsToWithCompositeKey'
        );
    }

    public function user(): BelongsTo
    {
        return new BelongsTo(
            Account::where('owner_id', $this->owner_id)
                ->join('users', 'accounts.user_id', '=', 'users.id')
                ->selectRaw('users.*'),
            $this,
            'owner_type',
            'owner_type',
            'User'
        );
    }