simple push / pull payment

Payment.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

contract Payment {
    address public payee = msg.sender;

    string public agreement;

    uint256 public payment = 0.1 ether;

    modifier onlyPayee {
        require(msg.sender == payee);
        _;
    }

    function setAgreement(string calldata agreement_) public {
        agreement = agreement_;
    }

    function payGroup(address[] calldata users) public payable {
        unchecked {
            for (uint256 i; i < users.length; i++) {
                (bool success, ) = users[i].call{value: msg.value / users.length}("");
                require(success);
            }
        }
    }

    function takePay() public onlyPayee {
        (bool success, ) = msg.sender.call{value: payment}("");
        require(success);
    }

    receive() external payable {}
}