The following are the user stories with the title of the Users theme:

• Register: As a visitor, I want to register a user account with my email address, username, and password.

The acceptance criteria is as follows:

• The email address must not already exist in the system
• The username must not already exist in the system
• The password must be at least six characters
• The password must contain at least one number
• The password must contain at least one letter
• Log in: As a registered user, I can use my username or email address with the password to log into the application.