Eklenti dökümanında setup açıklaması var, oraya bakın isterseniz. Adımlar;

Create a MaxMind license key

If you do not have an account on MaxMind.com, create one from https://www.maxmind.com/en/geolite2/signup

• On the registration page, complete the form with your information. If you’re not sure what to choose as “Industry” and “Intended use” fields, fill them with “eCommerce” and “Price localization,” respectively.
• After submitting, you’ll get an email shortly after submitting with a link to set your password.
• Click on that link and choose a password.

After creating the account, go to: https://www.maxmind.com/en/account

• Select the “Manage License Keys” tab in your user account dashboard.
• Select “Generate new license key.” In the form:
  • Add a description (just like the name of your store)
  • Choose “No” next to “Will this key be used for GeoIP Update?”
  • Select “Confirm.”

Kaynak: https://www.pricebasedcountry.com/do...e-geolocation/