In order for the platform to track affiliate activity affiliates must be assigned a unique Tradedoubler ID. Affiliate links can only be generated from within the platform.
However, if you already have affiliates you’d like to work with through Grow you can ask them to sign up to the network, through sending them to this sign-up page: https://grow-platform.tradedoubler.com/p/publishers/sign-up and asking them to apply to your program.
You may want to make use of the Profile Page for your program (you can embed this page on your own website, or use the link to circulate a program summary to affiliates who are not yet on the network).