How to use login() function in joomla?

• You can use Below code during develop module and component with login functionality, get your username and password dynamically and put in array function.
• when you call registration successfully function just add this code for autologin  functionality.

  $credentials = array( 'username' => '$name', 'password' => '$password');
    $login_site =& JFactory::getApplication('site');
    $login_site->login($credentials, $options=array());