public class Account { private string username; private string password; private string email; public void Login() { // code to authenticate user } public void ResetPassword() { // code to reset user's password } public void CreateAccount() { // code to create a new user account } public void UpdateInfo() { // code to update user information } }This code defines an Account class with private variables for username, password, and email. It also includes public methods for logging in, resetting a password, creating a new account, and updating user information. The package library for this code could be any number of .NET packages that provide common authentication and user management tools. Some possible options might include ASP.NET Identity, Microsoft Identity, or even just basic System.Security classes and methods.