By default casual visitors are allowed to register themselves on your website to gain access to additional resources. For example, registered users might be allowed to submit resources or simulation tools. Your website implements a user registration policy which can be adapted to suit your particular requirements so you decide what additional resources are made available. You can disable user registration altogether if you prefer.
Users register themselves on your website using the Register link typically found in the upper right-hand portion of every page (position may vary). Once registered, users will log in to your website by entering their username and password using the login form found at
http://yourhub.org/login. There are also links on the form to manage users who forget their usernames or passwords.
See Configuring Registration to learn more about changing registration settings.