install Magento 2 API Client

I want to install this dial but I do not understand or obtain GIT_USER_ID and GIT_REPO_ID.git

https://github.com/netz98/magento2-swagger-api-client-demo

{   "repositories": [     {       "type": "git",       "url": "https://github.com/GIT_USER_ID/GIT_REPO_ID.git"     }   ],   "require": {     "GIT_USER_ID/GIT_REPO_ID": "*@dev"   } }