title: laravel homestead cannot create project
body: <p>I have download homestead box manually, and add it to vagrant like: "vagrant box add laravel/homestead virtualbox.box".<br>
  Then I run command "vagrant init laravel/homestead" to create a new development environment. 
  Now I can start the virtual machine by "vagrant up". 
  I login into the new virtual machine by "vagrant ssh". 
  I run command "composer create-project laravel/laravel new-site" to create new project, but it always give error that authentication required (packagelist.org)</p>