add form to users and image link

[MBdip]

If you've copied the GitHub files and folders to your Joomla root and
3.Click 'Purge Cache' and then 'Discover'
there is a bunch of new plugins (about 50)

ohhh... there was an icon "discover" where was "purge cache"... ok, after installation? what i need to do?
after publishing plugin i found it in list->plugin, i published it but nothing changed...

but this plugin work in front end?

EDIT
the plugin add an icon in front end list like "refresh" icon near "delete" icon... so it work!

another question.... can i show an elements in a list but no in form? This is too ugly to see... was better to see icon then shown in list....

 

[MBdip]

ehy... i need ur help about a think...
in this list every users can add own name... but they can add own name a lot of time as they want, so they can add own name in all italian regions....

i wish they can add own name only one time!!!
i searched in validations but this doesn't work