'aws/aws-sdk-php': '^3.0',

'aws/aws-php-sns-message-validator': '^1.4'

require_once (Drupal::root() . '/vendor/autoload.php');

PHP message: PHP Fatal error:  require_once(): Failed opening required '/home/dash/public_html/docroot/vendor/autoload.php' (include_path='.:/usr/share/php') in /home/dash/public_html/docroot/modules/custom/awsintegration/src/Controller/AwsiInstanceListController.php on line 9

require '/home/dash/public_html/vendor/autoload.php';

PHP message: PHP Fatal error:  Class 'Drupal\awsintegration\Controller\Aws\Sdk' not found in /home/dash/public_html/docroot/modules/custom/awsintegration/src/Controller/AwsiInstanceListController.php on line 27

Warning: require_once(/home/dash/public_html/docroot/vendor/autoload.php): failed to open stream: No such file or directory in require_once() (line 9 of modules/custom/awsintegration/src/Controller/AwsiInstanceListController.php).