error registration

good afternoon I have a problem when I checked out this error “The Service ‘http://flightxml.flightaware.com/soap/FlightXML2/wsdl/_vti_bin/ListData.svc/$metadata’ at FlightXML2 requires a username and password.” as could fix it?

Your account (pruebas) does not have an API key yet. You must register for a FlightXML API key first: flightaware.com/commercial/flightxml/key

Additionally, that URL has garbage at the end of it. (“_vti_bin/ListData.svc/$metadata”) The URL of the WSDL is simply flightxml.flightaware.com/soap/FlightXML2/op