Hello @arta you can use the n8n cli to reset all users.
See: https://docs.n8n.io/hosting/cli-commands/#user-management
You can reset user management using the n8n CLI. This returns user management to its pre-setup state. It removes all user accounts.
Use this if you forget your password, and don't have SMTP set up to do password resets by email.
Go into the Cloudron n8n web terminal and run:
gosu cloudron /app/code/node_modules/.bin/n8n user-management:reset
Hope this solves your problem