Can I play with 2 Valorant accounts on one PC?

I would like to play with 2 different Valorant accounts on the same PC so that I can always switch. Is that banned or is it clear, I don't want to sell it or something…
But I also mean that I get the second key quite normally, only via a second Twitch account.

Can someone help me there?

That's fine. You just need 2 riota accounts.

OK thank you

At the same time?

No I mean I play with one, and sometime later I log out with one and the other and play with the second is that possible?

Yes, but for what?

Ok thanks because I don't want to play with some on my main account: /

how do i make multiple riota accounts and for that matter what is an riota account?