I'm trying to un-assign assistants to phone numbers via patch request. What value would I use for it to accept a null value? https://cdn.discordapp.com/attachments/1391746947869573200/1391746948058447912/image.png?ex=686d04d9&is=686bb359&hm=0c29ab7fa804ebdd19b58301511f8f2ab54266485b329c1e537151c7efc4a0d2&

Hey, can you send me a screen recording video that walks through the issue you are facing? It would be easier for me to understand your issue and help you out with it.