You might have to get it from the person who you bought the device from, in case they changed it. Have you looked at a User Manual to see if there is a default passphrase or way to reset the device to defaults?
Ruiz1, welcome to the forums.
I can help set up a technician for the pass phrase. Please send me a PM with your first and last name to get started!
To send me a Private Message, please click my name “ComcastAlly” and click “send a message.”