I am new on bitcoin concept. Few days ago I started working on it. I got my bitcoin address from https://freebitco.in while starting working through this. After few days I imported my bitcoin address in coinbase wallet but there alert showing that I need private key to use my funds.

Please help me to get my private key for present bitcoin address. I checked on https://freebitco.in but not found any option to get my private key. I am using my present bitcoin address on different faucets to earn free satoshis.

Thanks