old_contents: # Download the Python helper library from twilio.com/docs/python/install
  from twilio.rest import Client
  
  # Your Account Sid and Auth Token from twilio.com/user/account
  account_sid = "ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
  auth_token = "your_auth_token"
  client = Client(account_sid, auth_token)
  
  client.messages("MM800f449d0399ed014aae2bcc0cc2f2ec") \
        .update(body="")
  
new_contents: # Download the Python helper library from twilio.com/docs/python/install
  from twilio.rest import Client
  
  # Your Account Sid and Auth Token from twilio.com/user/account
  account_sid = "ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
  auth_token = "your_auth_token"
  client = Client(account_sid, auth_token)
  
  client.messages("MMXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX") \
        .update(body="")
  
subject: Use placeholder syntax for message sid