diff --git a/lib/composer/composer/autoload_classmap.php b/lib/composer/composer/autoload_classmap.php
index 703d624397c42358ba7f5564f908db32fbd4c761..59cac3db77583b5304a3d5d2672769bcea3acf19 100644
--- a/lib/composer/composer/autoload_classmap.php
+++ b/lib/composer/composer/autoload_classmap.php
@@ -55,6 +55,7 @@ return array(
     'OCP\\App\\IAppManager' => $baseDir . '/lib/public/App/IAppManager.php',
     'OCP\\App\\ManagerEvent' => $baseDir . '/lib/public/App/ManagerEvent.php',
     'OCP\\Authentication\\Exceptions\\CredentialsUnavailableException' => $baseDir . '/lib/public/Authentication/Exceptions/CredentialsUnavailableException.php',
+    'OCP\\Authentication\\Exceptions\\PasswordUnavailableException' => $baseDir . '/lib/public/Authentication/Exceptions/PasswordUnavailableException.php',
     'OCP\\Authentication\\IApacheBackend' => $baseDir . '/lib/public/Authentication/IApacheBackend.php',
     'OCP\\Authentication\\LoginCredentials\\ICredentials' => $baseDir . '/lib/public/Authentication/LoginCredentials/ICredentials.php',
     'OCP\\Authentication\\LoginCredentials\\IStore' => $baseDir . '/lib/public/Authentication/LoginCredentials/IStore.php',
diff --git a/lib/composer/composer/autoload_static.php b/lib/composer/composer/autoload_static.php
index ff7118e5bb1b03fef0931079ace485638629f271..b7e584c324a32699f7ac07cc8198faaea182d947 100644
--- a/lib/composer/composer/autoload_static.php
+++ b/lib/composer/composer/autoload_static.php
@@ -85,6 +85,7 @@ class ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c
         'OCP\\App\\IAppManager' => __DIR__ . '/../../..' . '/lib/public/App/IAppManager.php',
         'OCP\\App\\ManagerEvent' => __DIR__ . '/../../..' . '/lib/public/App/ManagerEvent.php',
         'OCP\\Authentication\\Exceptions\\CredentialsUnavailableException' => __DIR__ . '/../../..' . '/lib/public/Authentication/Exceptions/CredentialsUnavailableException.php',
+        'OCP\\Authentication\\Exceptions\\PasswordUnavailableException' => __DIR__ . '/../../..' . '/lib/public/Authentication/Exceptions/PasswordUnavailableException.php',
         'OCP\\Authentication\\IApacheBackend' => __DIR__ . '/../../..' . '/lib/public/Authentication/IApacheBackend.php',
         'OCP\\Authentication\\LoginCredentials\\ICredentials' => __DIR__ . '/../../..' . '/lib/public/Authentication/LoginCredentials/ICredentials.php',
         'OCP\\Authentication\\LoginCredentials\\IStore' => __DIR__ . '/../../..' . '/lib/public/Authentication/LoginCredentials/IStore.php',
diff --git a/lib/public/Authentication/Exceptions/PasswordUnavailableException.php b/lib/public/Authentication/Exceptions/PasswordUnavailableException.php
new file mode 100644
index 0000000000000000000000000000000000000000..f69b690266d8f686c0886245b147fc111c4ba146
--- /dev/null
+++ b/lib/public/Authentication/Exceptions/PasswordUnavailableException.php
@@ -0,0 +1,34 @@
+<?php
+
+/**
+ * @copyright 2017 Morris Jobke <hey@morrisjobke.de>
+ *
+ * @author 2017 Morris Jobke <hey@morrisjobke.de>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCP\Authentication\Exceptions;
+
+use Exception;
+
+/**
+ * @since 12
+ */
+class PasswordUnavailableException extends Exception {
+
+}
diff --git a/lib/public/Authentication/LoginCredentials/ICredentials.php b/lib/public/Authentication/LoginCredentials/ICredentials.php
index c5ef9574398dfc4369273d23e7b3a568f9984e10..1734e3e071528936f82547e916ec67ead6356ad0 100644
--- a/lib/public/Authentication/LoginCredentials/ICredentials.php
+++ b/lib/public/Authentication/LoginCredentials/ICredentials.php
@@ -24,6 +24,8 @@
 
 namespace OCP\Authentication\LoginCredentials;
 
+use OCP\Authentication\Exceptions\PasswordUnavailableException;
+
 /**
  * @since 12
  */
@@ -53,6 +55,7 @@ interface ICredentials {
 	 * @since 12
 	 *
 	 * @return string
+	 * @throws PasswordUnavailableException
 	 */
 	public function getPassword();
 }