Undefined property $id for users. But user has ID

I'm attempting to build up a query in Laravel.

I have two tables, with the following attirbuteds

User

• id (auto)
• name
• email
• userType
• password

TenantPreferance

• id (auto)
• county
• type
• user_id (this is the user who created their preference)

I'm trying to get a collection of data from users of a certain type where id of the user, matches the user_id in preferences.

But I get this error

Undefined property: Illuminate\Database\Eloquent\Builder::$id

$tenants = User::where('userType', 'tenant');
    $Prefereances = TenantPreferance::where($tenants->id, $Prefereances->user_id);
    $users = $Prefereances->get();

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