Ring 3 doorbell - AC connection

Dear,I would like to ask how to connect to Ring doorbell V3 to an AC adapter that is designed for doorbells. I have not yet connected the doorbell to the AC voltage yet, but i read here and there there is a need of a resistor for safety??? Can someone explain this please?- If it is needed, where do i buy it?- What type?- Should it be placed in serial in between one of the two wire's in the connection?- Can i put that resistor close to the AC transformer? Or does it need to be placed close to the doorbell? (this option is not really possible, since i cannot put the resistor somewhere safe, unless in the wall, or plastic box of the ring doorbell, what is a bad idea imo.For your information, this is the transformer i would like to use: [https://catalogue.bticino.com/app/webroot/low\_res/496424\_496452\_T8486E.pdf](https://catalogue.bticino.com/app/webroot/low_res/496424_496452_T8486E.pdf) It also notes that there is a cutoff in case of short circuit, do i still need that resistor? "After an overload or a short ciruit cut off input for 5 minutes."So this is an 12VA transformer, is this enough for the doorbell ?If this transformer is not good, what transformer do u guys advice, and do i still need that resistor then.Kind Regards,