How do you close a database connection in Node.js?connection.stop()connection.terminate()connection.close()connection.end()

To close a database connection in Node.js, you would typically use the connection.end() method. Here are the steps:

1. First, ensure that you have an active database connection. This is usually stored in a variable, often named connection or db.

2. Call the end() method on this connection object. This initiates a series of actions to terminate the connection.

Here is an example:

connection.end(function(err) {
  if (err) {
    return console.log('error:' + err.message);
  }
  console.log('Close the database connection.');
});

In this example, an optional callback function is passed to the end() method. This function is called when the connection termination is complete, or when an error occurs. If an error occurs, it logs the error message; otherwise, it logs that the connection was closed successfully.