You can find the necessary information for the WiFi default password and for the WLAN name (SSID) on the label on the bottom of your router. The login data is composed as follows:
WiFi Name (SSID)
Fiber7- and the last three character groups (without colons) on the label above the barcode. See example below.
The serial number of the device up to the slash.
If you have reset the configuration, the login data (by default) is as follows: