Node.js and SQLite3

I am want to create web server that will return data for my mobile app. I use Node.js for server and SQLite3 for database. I created method that must return data from sql, but I don't know how to do it correctly. As I know all methods from SQLite lib are async so I have no idea how to do sync request for DB. I tried this way:

app.get('/getAllLeagues',function (req, res) {
  console.log("get")
  var obj = db.all("SELECT name FROM Leagues")
})

But seems that obj is still the same as db object