Original 1919 Adolft Hitler painting?

[SilluAgain]

Hello everyone, today I bring you a very interesting piece. A painting done by Adolf Hitler in 1919. I know this is a militaria forum, but do any of you know someone who could help me authenticate this piece? It was purchased at the Ashcroft and Moore auction house, located near Philadelphia, United States. I attach a link: Attention Required! | Cloudflare. Now the buyer has put it up for sale. The only thing I've been able to investigate is the signature, and from my research, it doesn't look very promising. I haven't been able to find any similar signatures; in fact, they are quite different. I await your responses.

Regards.