Question How to rotate 3rd person Cinemachine camera using script

My goal is to rotate the camera to a specific direction upon loading scene.

Let's say the player character goes through a door and enters a new scene. I have made it so that the character would spawn at an empty object using its coordinates for location, but I cannot also use the rotation to set the camera to look away from the door. Cinemachine camera always centers towards the Z axis upon loading new scene.
The camera is set to follow and look at player character. Rotating the character does not rotate camera. I cannot simply rotate the camera, because as 3rd person camera it orbits around the player - different rotation means different position too.
I have found that the virtual camera object has a POV Aim/Horizontal Axis/Value parameter which seems to be the exact value I need to set. Is there a way to set in in a script?

So far I've been trying this to set aim same as empty object rotation:
cinemachineVirtualCamera.GetCinemachineComponent<CinemachinePOV>().m_HorizontalAxis.Value = gameObject.transform.eulerAngles.y;

but I get a null ref error.

 

Thank you for a reply.

After some dubugging I found my own mistake.
NullReferenceException actually happens on an earlier line:

cinemachineVirtualCamera = vcam.GetComponent<CinemachineVirtualCamera>();

I thought getting the virtual camera component was not working, because it was turning up as null. Turns out I simply forgot to assign the game object to the spawn point at one side of the door, but not the other.
The method I tried to set rotation works fine now.