Simple Login And Registration In Blockchain

Create user authentication in blockchain using solidity and remix ide

// SPDX-License-Identifier: GPL-3.0

pragma solidity 0.8.8;

contract AuthSystem{

    struct Users{

        string username;

        uint256 password;

    }

    Users[] public AllUsers;

    function CreateAccount(string memory _username, uint256 _password) public{

        AllUsers.push(Users(_username, _password));

    }

    function Login(string memory _username, uint256 _password) public view returns(string memory){

        for (uint256 i = 0; i < AllUsers.length; i++){

            if(keccak256(abi.encodePacked(AllUsers[i].username)) == keccak256(abi.encodePacked(_username))){

                if(AllUsers[i].password == _password){

                    return 'Logged in';

                }else{

                    return 'User found but Incorrect Password';

                }

            }

        }

        return 'User Not Found';

    }

}

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