That's now... I will lose the use of this tool. I'm not maintainer of a popular repository and I won't pay 10$/month at this time.
I will take a look on other opensource solutions (harder to install)
https://github.blog/2022-06-21-github-copilot-is-generally-available-to-all-developers/
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@metal3d Congrats! 
It seems that I participate to enough of #OpenSource projects on GitHub, so I can use Copilot for free.
Nice!