The point of creating an auth code for each device is to allow better account security. If one device or app gets compromised, you can revoke the device's auth code to help minimize it's effect
You'll need to enter your username and the device's auth code you created for it
Most likely, you entered the auth code incorrectly. Make sure the code matches or try creating a new code
Make sure you entered your username, and not the device name, into the username section. Device name is just a way to keep track of the auth codes.
Go here to reset your password
Most likely, you entered the auth code incorrectly. Make sure the code matches or try creating a new code
Make sure you entered your username, and not the device name, into the username section. Device name is just a way to keep track of the auth codes.