HereMaps - These credentials do not authorize access. Can't get valid response for Public Transit API

I have registered for a public 90-day free trial on HereMaps few days ago and I can't get a valid response for a public transit api. Routing works properly but that API doesn't. I call example request from documentation with my valid credentials:

https://transit.cit.api.here.com/v3/route.json
?app_id={APP_ID}
&app_code={APP_CODE}
&routing=all
&dep=41.9773,-87.9019
&arr=41.8961,-87.6552
&time=2017-12-11T07%3A30%3A00

after calling it, I receive that response:

{
    "Res": {
        "serviceUrl": "https://transit.cit.api.here.com/transit/v3/route.json",
        "Message": {
            "code": "I4",
            "level": "E",
            "text": "These credentials do not authorize access. Please contact your customer representative or submit a request here https://developer.here.com/contact-us to upgrade your account. You can also get valid credentials by registering for a free trial license on https://developer.here.com."
        }
    }
}

Any idea, what I'm doing wrong? I thought, that It might be due non-updated database on server-side, bud this seems to not be the problem. Thanks for your time.

Solution

Please find the reason and explanation below:

https://developer.here.com/faqs#general

How do I evaluate the HERE Platform? HERE offers a free trial of its web APIs and Mobile SDKs. To register for a free trial, please signup.

Please note that to access the following features we need to whitelist your evaluation app_id. Please contact us to request access to:

Batch Geocoding: allows the user to upload multiple addresses in a single file for geocoding.

Transit API Advanced Offering: access to advanced features of our Transit API, from early and late departures to real-time next departures and transit isoline.

Weather API: enrich mapping applications with weather-related data such as weather forecasts, severe weather alerts and astronomical information.

Fleet Connectivity Extension: RESTful web service that enables connectivity between a backend system and a navigation application.

Custom Route Extension: Build custom routes considering your own road restrictions and geometries.

Intermodal Routing: Provides alternative routes combining drive, park, ride and walk functionality, while taking into account real-time traffic and incidents information, public transit timetables and dynamic information.

I hope this helps!

Regards, Alberto