This WiFi login must be in a file and placed on the SD card. We can help generate the file for you! WARNING: Raspberry Pi's can have issues with 5Ghz WiFi networks, try 2.4Ghz if possible.
Enter your WiFi information (we do not save the information)
Download the file
Make sure the file is named octopi-wpa-supplicant.txt
Insert the Raspberry Pi's SD card into the computer
Place the file on the SD card (you'll need to replace the existing one)