supplier registeration form

Hello Guys,

I have created a supplier user group that is similar to admin.
They can add products and view orders by login in to the store front by going to domin/administrator .
However, the suppliers are given usernames and passwords from admin. Now, I want to create a form in the store front to enable the suppliers to register themselves.
Then the admin should see them in the users option of opencart dashboard.
Is there any idea about how this should be done?
The form will be similar to the customer regisetation form.


Regards,