Fatal error: Uncaught Error: Call to a member function prepare() on null in /var/www/staging/elshegun-backend/app/models/config.php:19 Stack trace: #0 /var/www/staging/elshegun-backend/app/helpers/send_email.php(50): App\Models\config->getConfigDetails() #1 /var/www/staging/elshegun-backend/app/helpers/send_email.php(76): App\Helpers\send_email->__construct() #2 /var/www/staging/elshegun-backend/app/services/user_service.php(65): App\Helpers\send_email::getInstance() #3 /var/www/staging/elshegun-backend/app/controllers/user_controller.php(12): App\services\user_service->__construct() #4 /var/www/staging/elshegun-backend/Routes/user-route.php(22): App\controllers\user_controller->__construct() #5 /var/www/staging/elshegun-backend/index.php(20): require_once('...') #6 {main} thrown in /var/www/staging/elshegun-backend/app/models/config.php on line 19