In your site TypoScript template under “Includes, Include static (from
extensions)”, include the static template “Onetimeaccount (onetimeaccount)”.
If you have not done so yet, create a system folder where the extension
should store the front-end user it creates.
Create one or multiple front-end user group(s) which the users created by
this extension should have.
On the your front-end login page, add a plugin content element.
This element can be next to your frontend login form, or it could
sit their instead of the login form (if you do not need a regular login
on your site).
In the tab “Plugin”, select “One-time FE account with autologin” as plugin
type.
Select which fields should be displayed.
Select which fields should be required.
Select the system folder in which the created front-end users should be
stored.
Select one or multiple user groups which the created front-end users should
automatically be assigned to.