Permissions: Allow only the Owner to Withdraw Ether

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In this step we restrict withdrawal to the owner of the wallet. How can we determine the owner? It's the user who deployed the smart contract.

//SPDX-License-Identifier: MIT

pragma solidity 0.8.1;

contract SharedWallet {

    address owner;

    constructor() {
        owner = msg.sender;
    }

    modifier onlyOwner() {
        require(msg.sender == owner, "You are not allowed");
        _;
    }

    function withdrawMoney(address payable _to, uint _amount) public onlyOwner {
        _to.transfer(_amount);
    }

    receive() external payable {

    }
}

Whatch out that you also add the "onlyOwner" modifier to the withdrawMoney function!