Aiogram + aiohttp/FastAPI, how to make friends?

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Compiled a bot from the Latand template . Works great. But it is necessary that the bot (not through the cart) catches the post with some json, parses and shoots the signed user. Tell me how to make such an apishka more correctly? In one 'process' is it possible to farm? Or how to distribute it? If you add to a stupid one, then loop aiogram and aiohttp are not friendly