You can use Zapier to manage this. I am including a link to a Zap which will assist you with the same. In order to ensure it's posted by a Bot account, you need to generate an access token for a bot account and use that to authenticate the API Call. Here's the Zap-https://zapier.com/shared/1a235c0910671665529d77239c7a26b5f6e97e30/12
You need to be familiar with the API calls to use this. Let me know if any questions!