I just installed Arch, but I can't use su/sudo to log into root!I'm tr

I'm trying to use Su to log into root.
I have tried My own password, root, (blank), toor, and admin, I just get invalid password.
I need to use su to make myself a sudouser so I can use actually sudo.

Please help. I can't go into fallback because it doesn't recognize my password. :/

Edit: I messed up the title. -_-

Have you added yourself to the wheel group? If not, login as root and run

Code:

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usermod -a -G wheel yourusername

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Then re-login with your normal user. From now on you should be able to use su and sudo.