2nd generation doorbell resistor

I keep seeing conflicting information on this. When wiring directly to a transformer (no existing chime) do i need to add a resistor? The manual states Yes: “If wiring directly to a doorbell transformer, connect a 25 ohm, 50W wirewound resistor in series with one of the doorbell wires to protect your Video Doorbell.” The product how to page states No: Ring Help How to connect your Ring Video Doorbell (2nd Generation) directly to a... If you don't have an existing doorbell but would like to avoid the need to charge the battery of your Ring Video Doorbell (2nd Generation), you can directly connect your Ring Video Doorbell to a lo... Ive skimmed through many community pages with conflicting info as well. Here are a couple: Does 2nd generation Ring video doorbell 2020 need a resistor Video Doorbells Does 2nd generation Ring video doorbell 2020 need a resistor or can it be directly wired to a AC transformer if I do not have an existing doorbell Which one is it?