composer-php How to use private repositories with Composer composer.json syntax

Example

{
    "name": "your/package",
    "license": "proprietary",
    "type": "project",
    "description": "How to load an external private Composer package.",
    ...
    "require": {
        "your/private_package": "*"
    },
    ...
    "repositories": [
        {
            "type": "vcs",
            "url": "https://example.com/Your/private-package.git"
        }
    ]
}