Changed to empty password, login not possible anymore

I tried to remove my admin password, by leaving both filds empty.
The empty password was accepted but I cann’t login any more because an empty password is not accepted by the UI.
Any idea how to solve this problem?

ssh -p 8101 openhab@localhost
Password authentication
Password:

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| 3.0.1 - Release Build

Use ‘’ for a list of available commands
and ‘[cmd] --help’ for help on a specific command.
To exit, use ‘’ or ‘logout’.

openhab> users
Usage: openhab:users list - lists all users
Usage: openhab:users add - adds a new user with the specified role
Usage: openhab:users remove - removes the given user
Usage: openhab:users changePassword - changes the password of a user
Usage: openhab:users listApiTokens - lists the API tokens for all users
Usage: openhab:users addApiToken - adds a new API token on behalf of the specified user for the specified scope
Usage: openhab:users rmApiToken - removes (revokes) the specified API token
Usage: openhab:users clearSessions - clear the refresh tokens associated with the user (will sign the user out of all sessions)
openhab> users list
admin (administrator)
openhab> users changePassword
Usage: openhab:users changePassword - changes the password of a user
openhab>

Thanks a lot. That was the solution.