I know it has been a while since you posted, hope you will still find this useful.
Without using the Discord “make api call” module. or the discord API through the HTTP module. which would be the correct way to do this.
This can be done using stock discord modules in make, and using discord member roles. but this has a giant caveat:
This balloons out of control very quickly. and may not be feasible depending on the number of users involved.