Add YouTube API Key and hide in React App

When i create my first blog 2.5 years back, it was a React app which was using YouTube API. You can find the link for it here.
Now, i did the classic beginners mistake of pushing my youtube data API keys to github. I received a mail also from google to remove it.
So, i decided to remove them from public github. For this i first cloned my repo from github.

You can read the rest of the article on my blog site in the below link.