Multi Line Commands with "\" don't work in Powershell - ravali-rimmalapudi/twilio-cli GitHub Wiki
In MacOS and Linux we use the "" to have a multiline command.
For Windows with Powershell there is a different syntax: https://stackoverflow.com/questions/3235850/how-to-enter-a-multi-line-command
twilio api:core:messages:create `
--from "+XXXXXXXXX" `
--to "+XXXXXXXXX" `
--body "I love Twilio"