Password of the day?

so this is my horrible modem im a trying to config in advance tab it prompts me with a must have password of the day message? i never set one up how to i create one?

System:ARRIS DOCSIS 3.0 Touchstone Residential Gateway
HW_REV: 5
VENDOR: Arris Interactive, L.L.C.
BOOTR: 2.2.0.27
SW_REV: 8.0.124.SIP.PC20.TW
MODEL: DG1670A
Serial Number:
Options:
Firmware Build and Revisions
Firmware Name: TS0800124_110614_16XX.GW_PC20_TW
Firmware Build Time: Thu Nov 6 15:09:21 EST 2014
eSAFE 0 FW Revision: TS0800124_110614_ARRIS_GW