Unexpected identifier when using module.exports (Node.js)

Question

I have the following module that I use to connect to my database:

module.exports = {

    var sequelize = new Sequelize('db', 'rt', 'pw', {
      host: "localhost",
      port: 3306,
      socketPath: '/var/run/mysqld/mysqld.sock',
      dialect: 'mysql'
    })
}

and then in the main file

var configDB = require('./config/database.js');

But, unfortunately, this leads to the following error:

/config/database.js:3
    var sequelize = new Sequelize('db', 'rt', 'pw', {
        ^^^^^^^^^
SyntaxError: Unexpected identifier
    at exports.runInThisContext (vm.js:69:16)
    at Module._compile (module.js:432:25)
    at Object.Module._extensions..js (module.js:467:10)
    at Module.load (module.js:349:32)
    at Function.Module._load (module.js:305:12)
    at Module.require (module.js:357:17)
    at require (module.js:373:17)
    at Object.<anonymous> (/server.js:14:16)
    at Module._compile (module.js:449:26)
    at Object.Module._extensions..js (module.js:467:10)

Am I using the function exportsincorrectly? This error occurs for each object in the export module.

EDIT: the following returns cannot call method .authenticate of undefined, although the module seems to export without errors.

configDB.sequelize // connect to our database
  .authenticate()
  .complete(function(err) {
    if (!!err) {
      console.log('Unable to connect to the database:', err)
    } else {
      console.log('Connection has been established successfully.')
    }
  }) 

Answer 1

. , ( , configDB ?), - . , - :

var sequelize = new Sequelize('db', 'rt', 'pw', {
  host: "localhost",
  port: 3306,
  socketPath: '/var/run/mysqld/mysqld.sock',
  dialect: 'mysql'
});
module.exports = sequelize;

: , javascript, , , database.sequelize configDB:

var configDB = require('./config/database.js');
configDB
  .authenticate()
  .complete(function(err) {
    if (!!err) {
      console.log('Unable to connect to the database:', err)
    } else {
      console.log('Connection has been established successfully.')
    }
  })