Manual:Account creation
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Account creation is done through Special:CreateAccount. It is possible, through the configuration setting $wgGroupPermissions, to disable account creation or to limit it to sysops; see Manual:Preventing access#Restrict_account_creation. There are three types of account creation, each with a separate log event action type:
create— a new user creates his own account.create2— another user account is created by an existing user.autocreate— a new account is autocreated using AuthPlugin.