/jira-server install JIRA_URL USER PASSWORD, where:
Note: We advise against using your own Jira user in the installation process. That is because the Rocket.Chat App has to persist the credentials to be able to search for projects and issues later on. We recommend creating a new user with administrative privileges. After the installation process, you can revoke those privileges from the user.
/jira-server connect. You will receive an ephemeral message containing the list of projects in your Jira that are available for you to connect to. Now for every project you want to connect, you can run the slashcommand
/jira-server connect PROJECT_KEY.