This tutorial explains how you can add pre-paid charge keys so that EV drivers can pay to purchase these charge keys as a one-time usage.
Click on "Customer" found in the side bar
Click on "Add Pre-paid key" to add a charge key with it's relative amount
Fill out the information. Merchant Name: this is to help you store where the charge key is sold. ID: You can retrieve the charge key ID from WrenEV app if necessary.
Add the amount you wish the charge key to contain. Once this charge key is linked to an account the amount will be transferred to user's WrenEV wallet.
When done, click on "Create"
and Done!
You successfully completed the guide!