First Go To /Coinpayments_Config Directory
Fill Out $private_key, $public_key(recived from coinpayments), $ipn_url (the url of ipn.php upload to your server) & finally select a $password which will be used to verify at get_callback_address.php
crypto_from_coinpayments = TRX, BTC, ETH & etc....
unique_identifier = It can be anything to identify the user who made deposit like telegram id , email or any unique id given to user.
password_you_used_at_config.php = The password you setuped at Coinpayments_Config/config.php in $password variable default it will be setuped to 'aditya'
---Note : The ipn.php is currently only saving details to a txt file you have to edit to your own needs---