How can I check if the user has a role for one to one relationship?

I have an application with User and Role model and a one to one relationship between them. How can I check if the user has a role. I am getting an SQLSTATE[42S22] error.

SQLSTATE[42S22]: Column not found: 1054 Unknown column 'roles.user_id' in 'where clause' (SQL: select * from roles where roles.user_id = 1 and roles.user_id is not null and name = client limit 1)

• Database Structure

Users
---------------
* id
* name
* email
* password
* role_id
* created_at

Roles
---------------
 * id
 * name
 * slug
 * created_at

• App/Models/User

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

public function hasRole(string $role) 
{
    if ($this->role()->where('name', $role)->first()) {
        return true;
    }
    return false;
}

• App/Models/Role

public function users() 
{
    return $this->belongsTo(User::class);
}