In Twilio Studio, I am attempting to play back digits gathered by a "Gather Input On Call" widget. I have the following text specified to be spoken aloud: "You entered {{widgets.GatherPIN.Digits}}."
When this message plays, I hear something like: "You entered one thousand three hundred twenty four," rather than, "You entered one - three - two - four."
How can I specify that each digit should be read aloud individually?