Open your WemX Panel, login as administrator and click on "Giftcards". In the dropdown choose "Settings".
You need to fill the WemX URL field with your applications domain that needs to end with a / otherwise it will NOT work.
You need to create a API Key of you application with every permission. For this go to wemx.app/admin/api-v1 Create a Token and paste it into the api key field
(optional) You can set the Currency symbol to what ever you want. We recommend $ € etc.