Sonoff socket S60 online account :-( remedy - what is your tip for me?

I bought the Sonoff S60 socket and I must say I am more than surprised that I now need an online account to integrate it into my home assistant environment.
Why is this necessary if I already have it integrated into my plan? Is there a workaroud?
Maybe I should send them back and continue to expand my Tradfri equipment with sockets so as not to have another manufacturer in the network.
What do you think?

This thing got some esp32-c3 inside which are the good news (compatible with espHome that allows full control and ownership) - the bad news are the case glued and it might not be possible to free it without breaking/damaging :person_shrugging:

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For serial flashing you could use a clamp and squeeze it just enough to open it up.
I know some people have used heat gun around the edges to remove the adhesive and pry it with a thin knife