UserResource page. I don't want to have to recreate the form, so I'm doing this in my TeamMembersRelationManager:mutateDataBeforeCreate and mutateDataBeforeSave methods to strip any non-numeric character from the input. Filament doesn't seem to be also using those methods when referenced from the relation manager. I don't know where the form is being handled when it's done like this. I would expect it to be handled by the CreateUser or EditUser Page, but it doesn't seem to be doing that. I've also tried adding the methods to my TeamMembersRelationManager class as well, but that's not working. Am I better off just copying the form code to my relation manager, I hate doing that as it's not DRY..