Help please.class diagramI would like to make class diagram

Help please.class diagramI would like to make class diagram for (Create Account, Email Confirmation, and Account Activation):#User registers for an account on System#User enters the following data:- username-user email# Chosen User Identifier for the account – System must ensure the user id is at least 5 characters, and no existing accounts with the same user id- If same user id exists, System must require User to choose another user id#Password – System must ensure the password must be at least 9 characters but no more than 18 characters long.  Password must contain some upper case and lower characters, some digits, and some special characters such as $, !, #, -, etc…– For example, CSUF-spring2015# User submits account registration form è Must use GRASP and/or GoF patterns to create and store new account information# Upon account registration submission, System sends an email to User è Must use GRASP and/or GoF patterns# User must activate the account upon receipt of email within 15 days (adaptable)-System will remove account if User does not activate the account within 15 daysThe classes that you should use it:·Model·View·Controller·DBHandler·EmailHandler class diagrams should includes every thing as the attachment exampleExamplenew-class_diagram.pdf