problem with async / await in objection

async_function_in_objection.js

async function tryByMonitor(sensorObject, monitor){
    const sensorQuery = sensorObject.query()
    .select('*')
    .where('monitor', monitor)
    .limit(1)
    .then(function (queryResult){
        if (! queryResult.length ) return null
        console.log(queryResult[0].monitor + " from function");
        return queryResult[0];
    })
}

async function getSensor(){
    const sensor = await tryByMonitor(GpsSensor, "32002bgps");
    console.log(sensor.monitor)
}