(baro) sensor offset calibration?

I've done both described procedures,

>[Bangle.barometerRd(0xD0),Bangle.barometerRd(0x0D)]
=[ 0, 16 ]
> 

and

Bangle.getPressure().then(d=>{
  console.log(d);
  // {temperature, pressure, altitude}
});
=Promise: {  }
undefined

I don't speak js in the slightest, no idea what to make of this so thanks for your help!