remove validation on name in laravel 6 on creating new user

I want to remove validation on the name in laravel 6 on creating a new user. user is creating successfully but when I am entering the name with space or capital letters login page is opening. but if I remove space from the name everything is working fine with the following code.

  protected function validator(array $data)
{
    return Validator::make($data, [
        'name' => ['required', 'string', 'max:255'],
        'email' => ['required', 'string', 'email', 'max:255', 'unique:users'],
        'password' => ['required', 'string', 'min:8', 'confirmed'],
    ]);
}
protected function create(array $data)
{

    $username = slugify($data['name'])."-".mt_rand(10000, 99999);
    return User::create([
        'name' => $data['name'],
        'username' => $username,
        'email' => $data['email'],
        'password' => Hash::make($data['password']),
    ]);
}

via Chebli Mohamed