public function register(Request $request)
{
    $code = rand(10000,99999);
    $user = User::create([
        'first_name' => $request->first_name,
        'last_name' => $request->last_name,
        'gender' => $request->gender,
        'mobile' => $request->mobile,
        //continue code
    }
    return redirect()->route('verification/?session'.$session);
}