Are your referring to the WiFi password?
Kindly try this following steps:
1.Launch a browser and enter 192.168.254.254 in the address or URL bar.
2.Enter Log In credentials.
Username: user (by default)
Password: @l03e1t3 (by default)
3.From Home page, go to Settings.
4.Go to WLAN.
5.Go to WLAN Basic Settings.
6.On WLAN Basic Settings page, type new password in WPA pre-shared key box.
“Success” notification will prompt.