Authentication Required (packagist.org)

Question

I’m trying to create a project in Laravel with the command:

composer create-project --prefer-dist laravel/laravel blog

But is requiring an authentication:

Authentication required (packagist.org)
  Username:
  Password:

I don’t remember registering on that site.

Someone knows how to fix it?

Answer 1

I went through it using macOS... only left blank the two fields (clicking enter) and after that appeared a message I clicked enter again. Ready, it ran the Poser update