Don't worry, once you have entered the Wi-Fi password in a laptop, you can access it through simple steps.
On Windows 10, select the Start button, then select Settings > Network & Internet > Status > Network and Sharing Center.
In Wi-Fi Status, select Wireless Properties.
In Wireless Network Properties, select the Security tab, then select the Show characters check box.
Your Wi-Fi password should display now.
Hope, this information was quite useful.