So I have access already to the Ubee modem login but I just got a new router, well modem/router combo which is a Netgear Ac1600. My question is how to get WiFi from the Netgear?
What are you trying to accomplish? And what are you paying Spectrum / TWC for?
If you have a Ubee all-in-one router from the cable company, are you paying them for home wifi? Or is the all-in-one set in bridge mode and is serving as a modem only? Are you trying to avoid the $5 / month fee for wifi service? Do you want to add the netgear AC1600 as a second wireless access point?
The path forward depends on what you are attempting to do.
Why did you buy an all in one if you didn't plan to replace the leased Ubee?
That's the only way it will work, you can't have 2 modems on one account, lol.