Hello!
To change the Wi-Fi password of a Huawei device, perform the following steps:
1. The default IP address of a device is generally 192.168.1.1. Enter the IP address in the address bar of your browser.
2. Enter the default login account and password of the device and click Login.
Username: user
Password: HuaweiUser
3. In the navigation tree, choose Home Network > WLAN Settings > WLAN Encryption. In the pane on the right, you can configure the encryption parameters related to the Wi-Fi network and modify the Wi-Fi SSID and password in the text boxes marked in red in the following figure.

4. Click Save.
The username and password for logging in to the web interface:
Username: user
Password: HuaweiUser
You are advised not to change the username and password