Proper way to detect both mouse buttons down

Hi,

I'm learning Unity and starting with basic character movement and camera controls. I'm essentially copying WoW character movements. I want to move my game object forward when both mouse buttons are held down. I can make it work but the code seems clumsy and I wonder if there is a better more professional way using Inputs or "something". My code is below:

     bool _running = false;
     bool _leftDown = false;
     bool _rightDown = false;
 
     public virtual void GetInput()
     {
         //forwardInput = Input.GetAxis(inputSettings.FORWARD_AXIS); // interpolated
         if (Input.GetMouseButtonDown(0))
         {
             _leftDown = true;
         }
 
         if (Input.GetMouseButtonDown(1))
         {
             _rightDown = true;
         }
 
         if (_leftDown && _rightDown)
         {
             _running = true;
         }
 
         if (Input.GetMouseButtonUp(0))
         {
             _leftDown = false;
             _running = false;
         }
 
         if (Input.GetMouseButtonUp(1))
         {
             _rightDown = false;
             _running = false;
         }
 
         turnInput = Input.GetAxis(inputSettings.TURN_AXIS);
         jumpInput = Input.GetAxisRaw(inputSettings.JUMP_AXIS); 
     }

I call this in Update and follow on from this in FixedUpdate to actually use the _running flag to setup forward velocity etc. I guess Im asking if there is a one liner for all of this. Seems like a lot of code for something so simple.

I tried creating a custom input with Mouse 0 + Mouse 1 but the editor wouldn't allow it.

Thanks