How to get access to Nvidia DRIVE Constellation Simulator.

I am interested to know about the NVIDIA DRIVE Constellation simulator and how to get access to it. I am working on a project that aims to identify misbehavior/malfunctioning in sensor data using Machine Learning techniques and was looking for simulator tools when I came across Nvidia DRIVE Constellation Simulator. I tried hard to locate the link to download the simulator but unfortunately, didn’t find anything. There is quite a good amount of documentation and download link to DRIVE AGX and PX2 but not on DRIVE Constellation.
I would highly appreciate it if anyone can please help me out with getting the access as the website says that it is a cloud-based open-source simulator tool.
Thank you.