can't go into play minecraft

Minecraft Java launcher.

So basically I accidentally uninstalled minecraft Java launcher.

I reinstall it and it try joining but it tells me to sign in with a Mojang account. I do not have one since I just joined very recently where I had to make a Microsoft account. Now I cannot even play. I try many things like restarting the computer, deleting and reinstalling, etc. Maybe you can make me a temporary Mojang account?