// 4.Delete a station
app.delete('/stations/:stationid',(req, res) => {
    for (let i=0;i<stations.length;i++){
        if (stations[i].stationid == req.params.stationid){
            var jason = stations[i]
            stations.splice(i,1)
            for(let j=0;j<observations.length;j++){
                if(observations[j].stationid == req.params.stationid){
                    jason.observations.splice(j,observations.length,observations[j].stationOb)
                    observations.splice(j,1)
                    res.status(200).json(jason);
                    return;
                }
            }
        }
    }
    res.status(404).json({'message': "Station with id " + req.params.stationid + " does not exist."});
});