To override the Content-type in your clients, use the HTTP Accept Header, append  the .json suffix or  ?format=json
To embed the response in a jsonp callback, append ?callback=myCallback
        
        HTTP + JSON
         The following are sample HTTP requests and responses. 
            The placeholders shown need to be replaced with actual values.
POST /v1/login HTTP/1.1 
Host: prod-api-auth-mb-dhc.rapp-customers.co.uk 
Accept: application/json
Content-Type: application/json
Content-Length: length
{"AuthCode":"String","ErrorCode":"String","ClientId":"String","Secret":"String","CallbackUrl":"String","RedirectUrl":"String"}
 
HTTP/1.1 200 OK
Content-Type: application/json
Content-Length: length
{"RedirectUrl":"String","IsAuthenticated":false,"UserToken":"String","UserId":"String","UserRoleId":[0],"DefaultRetailer":"String","LoginStatus":"Authenticated","UserRoleRedirect":"String","DefaultVehicleType":"String","EntitlementGroup":["String"]}