As one of your first steps when starting your journey with Transposit, set up Slack, as described below, then add a custom Slack field in an incident type.
You will then have enabled your team to set up Slack in their incidents and use Transposit from Slack.
In the Organization settings, you connect and read a user directory from Slack and add a Transposit bot to it.
In the Account settings, you link a Transposit user with a Slack user. This enables Slack content to be brought into Transposit and to associate it with the correct users.