adding

app/Commands/LetsEncryptAddCommand.php

@@ -48,5 +48,10 @@ class LetsEncryptAddCommand extends Command
 
         exec('certbot --non-interactive --agree-tos -m '.$this->argument('email').' --nginx '.$domainFlags, $output);
         $this->line(implode("\n", $output));
+
+        foreach($output as $line) {
+            //Congratulations!
+            //check for string 
+        }
     }
 }