License keys deployement on clients' websites

Hi there,
I just would like to know if there’s a technical solution to deploy plugins on clients’ websites, and also activate them with a license key, automatically?
Because actually, I can deploy plugins on clients sites, but I need to connect as admin on each of them and the enter license keys manually.
Is there a solution somewhere?

Thanks a lot for your help and answer.
Best regards,
Julien