EveryPay
Configure the following parameters for the Connector (see Connector Config - EveryPay):
- Fill in the mandatory Username Merchant Account Username
- Fill in the mandatory Password Merchant-Account Password
- Fill in the mandatory API Secret generated and provided by EveryPay

Webhooks
Set up Webhooks in your account settings page from the EveryPay Dashboard interface (https://dashboard.everypay.gr) — after logging in with your credentials. For further information have a look at EveryPay's integration guide https://docs.everypay.gr/tools/webhooks/.