Hi Ronal,
You need to consume the API's Rest service. If you want to do this with Mendix then all you need to do is follow this How-to: https://docs.mendix.com/howto/integration/consume-a-rest-service
Follow the API documentation closely and it's very easy!
Good luck
Check out this documentation on cosuming a REST service: https://docs.mendix.com/howto/integration/consume-a-rest-service