If you have chosen Email-based self-registration and wish potential users to be able to create their own accounts, select Email-based self-registration from the self registration dropdown menu in the common settings section. Potential users will then be presented with a Create new account button on the login page.
The Email-based self-registration authentication plugin must be enabled to allow users who previously self registered via this plugin, to log in with that plugin. Selecting Email-based self-registration as the self registration method allows potential users to self register.
