| Parameters | Details | 
|---|---|
| repositories | Tells Composer where it can download the required packages. | 
| type: vcs | Tells Composer how to treat the repository. | 
| url: http://... | Tells Composer where is the repository. | 
Use the type: "vcs" syntax to use private repositories.
To manage access to the private repository while developing on a local machine, use an auth.json file and don't commit it in you project repository. Instead, give access to each single developer to the private repository so, using each one his/her own NOT COMMITTED auth.json file, they can fetch the remote repository with composer install or composer update.
Tip: Put the auth.json file in the .gitignore file of your git repository.
If you are using a continuous integration system, use the COMPOSER_AUTH environment variable.