Could you be more specific? I suspect you mean your wifi password.
Connect to yout router going to https://mynetworksettings.com or htttps://192.168.0.1 or whatever address is in the manual and login
And there's menu options on the left side to update your wifi password.
Please see the link below for the steps to personalize your Home Internet password.
https://www.verizon.com/support/knowledge-base-218828/
-Natasha
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