To change your WiFi password, you can follow the steps below:
Login to portal.spotonwifi.com
Go to 'welcome page'
3. Click on 'Settings'
4. At the bottom of this page you can change your private network SSID and password
5. After making changes, click save. It may take a few minutes to make the changes.
Are you having trouble logging in after resetting your password? See this article.