/**
* Add a new role.
*
* @param string $roleName The name of the role.
* @param text $description The description of the role.
* @param int $level Defines the importance of the role. Default is 0.
* @return void
**/
public function addRole($roleName, $description, $level = 0)
{
if (!$this->roles->exists($roleName, true)) {
return $this->roles->addRole($roleName, $description, $level);
}
throw new \InvalidArgumentException("Role doesn't exist or is soft-deleted");
}