JugglingDb how to catch connect?

Question

MySQL

I want to connect to mySQL database.

const Schema = require('jugglingdb').Schema;
const schema = new Schema('mysql', {
      host: host,
      username: user,
      password: password,
      tableName : tableName,
      database: ddbname,
      port: port
   });

When all the data is correct, the connection goes well. But when the data is NOT correct, an exception is thrown and an infinite reconnect occurs.

connection.connect err { Error: connect ECONNREFUSED 127.0.0.11:3306
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1117:14)
    --------------------
    at Protocol._enqueue (E:\Web\apc-nodejs\node_modules\mysql\lib\protocol\Protocol.js:144:48)
    at Protocol.handshake (E:\Web\apc-nodejs\node_modules\mysql\lib\protocol\Protocol.js:51:23)
    at Connection.connect (E:\Web\apc-nodejs\node_modules\mysql\lib\Connection.js:118:18)
    at initializeConnection (E:\Web\apc-nodejs\node_modules\jugglingdb-mysql\lib\mysql.js:53:20)
    at Object.initializeSchema [as initialize] (E:\Web\apc-nodejs\node_modules\jugglingdb-mysql\lib\mysql.js:34:5)
    at new Schema (E:\Web\apc-nodejs\node_modules\jugglingdb\lib\schema.js:106:13)
    at router.post (E:\Web\apc-nodejs\routes\addApp.js:25:22)
    at Layer.handle [as handle_request] (E:\Web\apc-nodejs\node_modules\router\lib\layer.js:93:5)
    at next (E:\Web\apc-nodejs\node_modules\router\lib\route.js:138:13)
    at Route.dispatch (E:\Web\apc-nodejs\node_modules\router\lib\route.js:109:3)
  errno: 'ECONNREFUSED',
  code: 'ECONNREFUSED',
  syscall: 'connect',
  address: '127.0.0.11',
  port: 3306,
  fatal: true }
will reconnect in 60 secs

I guess

connection.connect

is an (object?) of mySQL itself and the question is: how to catch this exception in case of incorrectly entered data and execute disconnect()?
Studied the Jugglingdb doc and schema and schema objects. No hint of handling this error.