Password Lost / Access not possible

Hello everyone, a new user from Germany with a forgotten password problem.

I still have access via FTP and followed the instructions in another post here, but apparently I’m stuck. What I did:

Deleted the only folder in site/accounts (I only had one user so far)

Then entered the following in /site/config/config.php:

return [
'panel' =>[
'install' => true
]

After that, I was able to log in by creating a new user via the panel, but after it started all over again. Invalid login.

I then created another new user, also as an admin, and the same thing happened.

What’s the error?

P.S. i have n clue why the post is marked as code, pardon me