The registration form is a pre-chat form
that requires the user to enter specific information before starting
the chat.
You can use the registration form as
a pre-chat form by limiting the information requested to the user to
only the user's email address or the user name, for example.
The log-in form is shown only if the registration password field is shown.
The password field is always shown when the user system is set to "WordPress".
If Settings> Users > Allow Duplicate Emails
is enabled and a user enters an already registered email, a new user is
created and the email is removed from the old user. The new user will
not have access to the old user's messages and conversations. You can
also automatically log in a user via URL parameters.