select a group when registering ? is there an addon plugin ?
AI-generated summary
The discussion revolves around selecting a group when registering on a Discourse forum. Ahmed26 inquires about the possibility of doing so and if there is an addon plugin available.
ondrej responds that there is no built-in feature for this but suggests using the Custom Wizard plugin to allow users to add themselves to groups during signup. Another possible solution is to use a URL that invites users to a specific group, as suggested by whitewaterdeu.
However, ondrej notes that this option is only available to staff. JammyDodger proposes an alternative solution using an Automation script that automatically adds users to groups based on a User Custom Field they select during signup. This method involves creating groups, a User Custom Field, and an Automation script.
There isn’t a feature /site setting that does this. However, I believe that the custom wizard plugin allows users to add themselves to groups on signup
That’s a great suggestion! I missed the invite feature completely. As a side note that option is only available for staff.
I think there’s also an Automation script that allows you to automatically add people to groups depending on the User Custom Field they select at signup (or whenever depending on how you set it up). For example:
Create the groups:
Create the User Custom Field:
Create the Automation:
Sign-Up:
See them added to the group: 
Fun quirk…
If you’re using the ‘Recurring’ trigger rather than ‘User first logged on’ you’ll need to use the user_field id rather than the user field name, but you can grab that from the relevant json if you need it /admin/customize/user_fields.json (in this case, mine’s 4)
NB: (note the format of the user_field_4)