How do I save my Aternos Minecraft world?

I created a server via Aternos a few days ago and everything went great. However, I just wanted to do it again today to notice that I forgot my password. Unfortunately, I did not deposit an email either. Is there any way to find out the password, or at least save the world somehow?

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You could try signing in with the "Google" button.

Nope unfortunateley not. Themselves to blame. And if it is an anonymous e-mail address created for it.