Error instalasi Laravel dengan Globally Installer

Hey semuanya, member Sekolah Koding, disini saya mendapatkan error saat menginstall laravel dengan Globally Installer dapat dilihat di bawah, namun saat saya pakai laravel/installer, berhasil terinstall, letak masalahnya dimana, mohon solusinya, sekian, terima kasih. #SalamKoding

karismaulana@ubuntunesia:/var/www/html/laravel5$ composer create-project --prefer-dist laravel/laravel blogger
Installing laravel/laravel (v5.5.0)
  - Installing laravel/laravel (v5.5.0): Downloading (100%)
Created project in blogger
> @php -r "file_exists('.env') || copy('.env.example', '.env');"
Loading composer repositories with package information
Updating dependencies (including require-dev)

    Authentication required (packagist.org):
      Username: yp3t7m
      Password:


  [Composer\Downloader\TransportException]
  Invalid credentials for 'http://packagist.org/p/symfony/var-dumper%24668b11
  698a6982c585534b7b3d975b32108ba2f951c16d9b05aa3c218f1e3563.json', aborting.


create-project [-s|--stability STABILITY] [--prefer-source] [--prefer-dist] [--repository REPOSITORY] [--repository-url REPOSITORY-URL] [--dev] [--no-dev] [--no-custom-installers] [--no-scripts] [--no-progress] [--no-secure-http] [--keep-vcs] [--no-install] [--ignore-platform-reqs] [--] [<package>] [<directory>] [<version>]