How change user post in incoming webhook

[minix]

Description

Hi mate, i use rocket.chat community version 5.0.6 - in WEBHOOK INCOMING i cannot change “user post”. i modify but remain the same. How resolve?

Server Setup Information

• Version of Rocket.Chat Server: 5.0.6
  

  

• Operating System: ubuntu 18.04

• Deployment Method: snap

• Number of Running Instances:

• DB Replicaset Oplog:

• NodeJS Version:

• MongoDB Version:

• Proxy:

• Firewalls involved:

Any additional Information