ok so lets say that the customer wants to add more seats to there subscription. how can i modify their sub_token to let them add more seats. i have tried to put the subtoken within the action url but i dont think that is how i should do that.
if they currently dont have additional seats added to their sub then i need to add it. If they already have add. seats then i know i can just send them to there subtoken so they can modify that.