Private Key should not be shared with anyone as you may loose all your assets.
Learn how to get your private key on XDC WebWallet
Steps to get your private key on XDC Network Web wallet
1) Login to your Web wallet
2) Go to print symbol below your wallet address (Wallet public key)
3) Scroll down to find your private key
If you find any difficulties, please drop in the comments. Also comment down, which "How to video" do you want next in this channel.