If you use Mattermost as your chat platform, you must configure your Mattermost before using Zowe Chat. You need to create an administrator account, a team, and a bot account in Mattermost.
You can use commands to install Mattermost Container on your server.
After you start the Mattermost container, you can create an administrator account and a team in Mattermost, and invite your colleagues to join the team.
Create a bot account in Mattermost.
Invite your bot user to your team so that you can invite it to your Mattermost channel, and talk with it in the channel.
You can create your own private channel in Mattermost, invite your bot user to your channel by adding new members, and talk with it in the channel.