Remove Role when using a template

I am using a template inside OneSpan to create the package. The template is set up for 2 signers but I would like to remove the second signer using the apex class if there's not one.

I am able to create the roles for both users, then create the package as a draft, then remove the second signer, then change the package to sent. This works. However, is there a way to remove the second signer before creating the package? Or is it best to use 2 different templates [1 for one signer, and 1 for two signers]?