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. The user is created successfully but when I enter a name with space or capital letters, the login page opens up. But if I remove all spaces from the name everything works 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']),
    ]);
}

blade.php code

https://codeshare.io/5e1kX7

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