User profile feature: Setting (Manage user account data)

as a log-in user, I want to manage my account, so that I can be delete my user data from the system

technical details

• in user profile page, there will be a setting button, it will open a setting pop up window for user
• in setting pop up window, user can select "Delete user account" button to permanently close down the account
• there will be another pop up window for double confirm that user wants to delete the account