How To Allow Vendors With User Account Sign Into Vendor Panel Automatically When They Sign In With Their User Account?

How to allow vendors with user account sign into vendor panel automatically when they sign in with their user account?

It is not possible out of the box

How can i achieve this, i mean what modification can I do to allow this? thanks

Why not? Yes, it is possible with code modification

Can you give me the modification?

Thanks

Please use link from my signature to get a quote

I no-longer have access to the messenger, we can negotiate here

Messenger is not required. Please use the following link

http://www.ecom-labs.com/index.php?quote

Will do