Tesla integration - Requires Tesla Proxy and Client ID - Developer Account

I got an authentication error on the Tesla integration and HA mentioned that I need to reconfigure the Tesla configuration. When I go through the steps and read about the issue it seems that Tesla has change the API interface. Owner API is not possible anymore and you need to use a Fleet API (if I understood correctly) and a proxy (GitHub - llamafilm/tesla-http-proxy-addon: Tesla HTTP Proxy Add-on for Home Assistant).

For the proxy I need a Client ID. To be able to get a Client ID I need to register a developer account at Tesla, for this I need a TAX number, and maybe more. I don’t have this. Is this the end of the free Tesla API usage and the HA Tesla integration?