This file contains the list of API users and API tokens.

Each user configuration section starts with a header user: <name>, followed by the user configuration options.

API token configuration starts with a header token: <userid!token_name>, followed by the token configuration. The data used to authenticate tokens is stored in a separate file (token.shadow).

user: root@pam
      comment Superuser
      email test@example.local
      ...

token: root@pam!token1
      comment API test token
      enable true
      expire 0

user: ...

You can use the proxmox-backup-manager user command to manipulate this file.