diff --git a/app/Controllers/authController.php b/app/Controllers/authController.php
index 02b8119e9..e1f895412 100644
--- a/app/Controllers/authController.php
+++ b/app/Controllers/authController.php
@@ -121,12 +121,8 @@ class FreshRSS_auth_Controller extends Minz_ActionController {
 			$username = Minz_Request::param('username', '');
 			$challenge = Minz_Request::param('challenge', '');
 
-			// TODO #730: change the way to get the configuration
-			try {
-				$conf = new FreshRSS_Configuration($username);
-			} catch(Minz_Exception $e) {
-				// $username is not a valid user, nor the configuration file!
-				Minz_Log::warning('Login failure: ' . $e->getMessage());
+			$conf = get_user_configuration($username);
+			if (is_null($conf)) {
 				Minz_Request::bad(_t('feedback.auth.login.invalid'),
 				                  array('c' => 'auth', 'a' => 'login'));
 			}
@@ -167,12 +163,8 @@ class FreshRSS_auth_Controller extends Minz_ActionController {
 				return;
 			}
 
-			// TODO #730: change the way to get the configuration
-			try {
-				$conf = new FreshRSS_Configuration($username);
-			} catch(Minz_Exception $e) {
-				// $username is not a valid user, nor the configuration file!
-				Minz_Log::warning('Login failure: ' . $e->getMessage());
+			$conf = get_user_configuration($username);
+			if (is_null($conf)) {
 				return;
 			}
 
@@ -240,14 +232,12 @@ class FreshRSS_auth_Controller extends Minz_ActionController {
 					$persona_file = DATA_PATH . '/persona/' . $email . '.txt';
 					if (($current_user = @file_get_contents($persona_file)) !== false) {
 						$current_user = trim($current_user);
-						// TODO #730: change the way to get the configuration
-						try {
-							$conf = new FreshRSS_Configuration($current_user);
+						$conf = get_user_configuration($current_user);
+						if (!is_null($conf)) {
 							$login_ok = strcasecmp($email, $conf->mail_login) === 0;
-						} catch (Minz_Exception $e) {
-							//Permission denied or conf file does not exist
+						} else {
 							$reason = 'Invalid configuration for user ' .
-							          '[' . $current_user . '] ' . $e->getMessage();
+							          '[' . $current_user . ']';
 						}
 					}
 				} else {
@@ -309,8 +299,11 @@ class FreshRSS_auth_Controller extends Minz_ActionController {
 			return;
 		}
 
-		// TODO #730
-		$conf = new FreshRSS_Configuration(FreshRSS_Context::$system_conf->default_user);
+		$conf = get_user_configuration(FreshRSS_Context::$system_conf->default_user);
+		if (is_null($conf)) {
+			return;
+		}
+
 		// Admin user must have set its master password.
 		if (!$conf->passwordHash) {
 			$this->view->message = array(
diff --git a/app/Controllers/javascriptController.php b/app/Controllers/javascriptController.php
index acd3fef69..421cf6f72 100755
--- a/app/Controllers/javascriptController.php
+++ b/app/Controllers/javascriptController.php
@@ -29,7 +29,7 @@ class FreshRSS_javascript_Controller extends Minz_ActionController {
 		if (ctype_alnum($user)) {
 			try {
 				$salt = FreshRSS_Context::$system_conf->salt;
-				$conf = new FreshRSS_Configuration($user);
+				$conf = get_user_configuration($user);
 				$s = $conf->passwordHash;
 				if (strlen($s) >= 60) {
 					$this->view->salt1 = substr($s, 0, 29);	//CRYPT_BLOWFISH Salt: "$2a$", a two digit cost parameter, "$", and 22 characters from the alphabet "./0-9A-Za-z".
diff --git a/lib/lib_rss.php b/lib/lib_rss.php
index 3a929631e..8bfc6eb10 100644
--- a/lib/lib_rss.php
+++ b/lib/lib_rss.php
@@ -237,6 +237,29 @@ function listUsers() {
 	return $final_list;
 }
 
+
+/**
+ * Register and return the configuration for a given user.
+ *
+ * Note this function has been created to generate temporary configuration
+ * objects. If you need a long-time configuration, please don't use this function.
+ *
+ * @param $username the name of the user of which we want the configuration.
+ * @return a Minz_Configuration object, null if the configuration cannot be loaded.
+ */
+function get_user_configuration($username) {
+	$namespace = time() . '_user_' . $username;
+	try {
+		Minz_Configuration::register($namespace,
+		                             join_path(USERS_PATH, $username, 'config.php'),
+		                             join_path(USERS_PATH, '_', 'config.default.php'));
+		return Minz_Configuration::get($namespace);
+	} catch(Minz_ConfigurationException $e) {
+		return null;
+	}
+}
+
+
 function httpAuthUser() {
 	return isset($_SERVER['REMOTE_USER']) ? $_SERVER['REMOTE_USER'] : '';
 }