sequelize with tunnel-ssh

ssh-sequelize.js

// sequelize config  

var sequelize = new sequelize('database', 'user', 'pass', {   
  host: '127.0.0.1',   
  dialect: 'mysql',   
  port: 3306,    
  pool: {     
    max: 10,     
    min: 0,     
    idle: 20000   
  } 
});

// tunnel config 
  
var config = {       
  user:'user',       
  host:'sshhost',       
  port:22,       
  dsthost:'127.0.0.1',       
  dstport:3306,       
  srchost:'127.0.0.1',       
  srcport:3306,       
  localhost:'127.0.0.1',       
  localport: 3306,       
  privatekey: require('fs').readfilesync('/path/to/key')     
};  
  
var tunnel = require('tunnel-ssh');  
// initiate tunnel 

tunnel(config, function (error, server) {   
  //....   
  if(error) {     
    console.error(error);   
  } else {     
    console.log('server:', server);    
    // test sequelize connection     
    sequelize.authenticate().then(function(err) {
      console.log('connection established');         
    }).catch(function(err) {             
      console.error('unable establish connection', err);         
    })   
  } 
}) 

not working for me