Mage2.PRO   Private repository

The private repository is not used anymore (1)
How to declare the repository to the Composer (1)
How to answer the question «The authenticity of host ' (' can't be established» on a «composer require» command? (1)
How to know the Composer package name for a Mage2.PRO extension based in the private repository? (3)
The special installation steps for the repository (1)