I am using the library to send messages to the chat.
import pymsteams
myTeamsMessage = pymsteams.connectorcard("<Microsoft Webhook URL>")
myTeamsMessage.title("Title")
myTeamsMessage.text("Text")
myTeamsMessage.send()
How can I access the sent message so that it can be changed over time.
As far as I can tell, this library does not support modifying your message but you can access what you sent by using myTeamsMessage.payload["text"].
Using that library you can't update already sent messages, it uses Teams Webhooks and only sends messages. Seems like you need https://docs.microsoft.com/en-us/microsoftteams/platform/bots/how-to/update-and-delete-bot-messages?tabs=dotnet