You can assign a discount offer to your campaign. This will automatically generate codes or affiliate links for each influencer added to the campaign. This way, you will be able to easily send codes to influencers.
If you want to create a new discount offer for your campaign:
Click on create a new discount offer, a new tab will open.
Create your new discount offer.
Click on "Update discount offers list" to have the new discount offer appear in the drop-down menu.