a.sol

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.7.0 <0.9.0;

/**
 * @title Owner
 * @dev Set & change owner
 */

 contract Main {

    struct User {
        string name;
        uint level;
    }

    mapping(address => User) public userLevels ;

    function addUser(address adds, string memory _name) public {
        User memory tempUser;
        tempUser.name = _name;
        tempUser.level = 0;

        userLevels[adds] = tempUser ;
    }

    function levelUpUser(address userAddress) public {
        userLevels[userAddress].level++; 
    }

    function getUser(address userAddress) public view returns (User memory) {
        return userLevels[userAddress];
    }

    function getUserLevel(address userAddress) public view returns (uint) {
        return userLevels[userAddress].level;
    }

    function deleteUser(address userAddress) public {
        delete userLevels[userAddress];
    }

 }