Creating new user account with multiple roles

Hopeful someone can provide an answer to this ...

I'm trying to create a new user account in integromat with multiple roles. Seems pretty simple and I can easily create an account with one role, but when trying to create 2 roles it doesn't work. Basically the module for creating the new record in the "Accounts" object has a field for "user roles". If I user an object with one role it works fine. If I enter raw text with the role name (ie. Admin) it also works fine. When I try an object with an array of 2 roles (ie. "Admin" and "Team Member") it creates the record in the "accounts" object but doesn't create the roles. When I enter in the raw text for roles (ie. Admin,Team Member) it once again will add the "accounts" record but not the roles. I don't know if it's a formatting issue or if Knack will just not create multiple roles from the Integromat scenario, but it's kinda hard to figure out when there is no error message sent back. Any help would be appreciated.