Vendor self-registration URL
Account page: https://cloud.protemos.com/account/info
You can give a special link to your vendors, and they can register in your database themselves.
To do so, go to the Settings=>Account menu:
It will bring you to the Account page where you can find this link in the Vendor self registration URL row:
Thus, you can copy this link and send it to your vendors so that they can register in your database themselves.