2Captcha is used to get your captchas completed. To start using it with GaneshBot CLI, you will need to grab your API key from the 2Captcha dashboard.
Click the Copy button next to your API key, and head over to the GaneshBot CLI.
Input the number corresponding to "Configure Settings", which is 61 in my case. It will display your settings.
Here you can quickly see your current 2Captcha Key (None in my case). To update your 2Captcha API key, input the corresponding number to "Update 2Captcha Key", which is 9 here.
Paste your key to input it (or leave blank if you want to remove your current key) and press Enter. You should now see a successful "Updated 2Captcha Key!" message.
GaneshBot CLI will now use your 2Captcha key to solve captchas when running for sites that use captcha (Offspring for example).