Authentication is very important in any project to control and give limited access to users for this purpose, in solidity we get this functionality with this pattern.

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.7.0 <0.9.0;

contract OwnerBasedRestriction{
    
    address owner;
    
    constructor(){
        owner = msg.sender;    
    }
    
    error unAuthorized();
    
    modifier onlyBy(address _addr){
        if(msg.sender != _addr)
            revert unAuthorized();
        _;
    }
    
    function changeOwnerShip(address _newOwner)public onlyBy(owner){
        owner = _newOwner;
    }
    
    function checkBalance()public view returns(uint){
        return address(this).balance;
    }   
}