Return JSON style response rather than throwing an exception. Sentry Issue: [ENGINE-1W](https://sentry.io/organizations/minds-inc/issues/1178224559/?referrer=gitlab_integration) ``` Exception: Could not decrypt private key File "/Core/Messenger/Encryption/OpenSSL.php", line 113, in Minds\Core\Messenger\Encryption\OpenSSL::unlockPrivateKey throw new \Exception('Could not decrypt private key'); File "/Core/Messenger/Keystore.php", line 56, in Minds\Core\Messenger\Keystore::unlockPrivateKey self::$tmpPrivateKey = $this->handler->unlockPrivateKey($this->getPrivateKey(), $password, $new_password); File "/Controllers/api/v2/messenger/keys.php", line 91, in Minds\Controllers\api\v2\messenger\keys::post $keystore->unlockPrivateKey($_POST['password'], $unlockPassword); File "/Api/Factory.php", line 90, in Minds\Api\Factory::build return $handler->$method($pages); File "/Controllers/api/api.php", line 81, in Minds\Controllers\api\api::post return Factory::build($pages, $this->request, $this->response); ... (2 additional frame(s) were not displayed) ```