diff --git a/server/core/App.php b/server/core/App.php
index bba99b4..ff2e1af 100755
--- a/server/core/App.php
+++ b/server/core/App.php
@@ -1,13 +1,21 @@
 <?php
 include_once("core/Plugin_Api.php");
 include_once("core/LibOverride/genTokenOptions.php");
+include_once("core/ErrorManagement.php");
+
+use OpenStack\Common\Error\BadResponseError;
+use OpenStack\Common\Error\BaseError;
+use OpenStack\Common\Error\NotImplementedError;
+use OpenStack\Common\Error\UserInputError;
 
 class App{
 	
 	protected $openstack;
 	protected $pluginsApi;
+	protected $postParams;
 	protected $tokenClass;
 	protected $tokenPost;
+	protected $errorClass;
 	protected $output;
 
 	public function __construct($args){
@@ -16,7 +24,9 @@ class App{
 		$this->tokenClass = new genTokenOptions($args);
 		$this->openstack = new OpenStack\OpenStack([]);
 		$this->pluginsApi = plugin_api::getInstance();
+		$this->errorClass = new errorManagement($this);
 		$this->output = array();
+		$this->postParams = $_POST;
 
 	}
 	
@@ -53,19 +63,37 @@ class App{
 			$this->tokenClass->genNetworkToken();
 			
 			$this->setOutput("token", $this->tokenClass->getBackup());
-		}catch(Exception $e){
-			echo $e;
+		}catch(BadResponseError $e){
+			var_dump($e);
+		}catch(UserInputError $e){
+			var_dump($e);
+		}catch(BaseError $e){
+			var_dump($e);
 			exit();
+		}catch(NotImplementedError $e){
+			var_dump($e);
 		}
 		
 	}
 	
+	public function getPostParam($name){
+		
+		return $this->postParams[$name];
+		
+	}
+	
 	public function setOutput($key, $out){
 		
 		$this->output[$key] = $out;
 		
 	}
 	
+	public function getErrorInstance(){
+		
+		return $this->errorClass;
+		
+	}
+	
 	public function show(){
 		echo json_encode($this->output);
 	}
diff --git a/server/core/ErrorManagement.php b/server/core/ErrorManagement.php
new file mode 100755
index 0000000..ebd5abe
--- /dev/null
+++ b/server/core/ErrorManagement.php
@@ -0,0 +1,39 @@
+<?php
+
+use OpenStack\Common\Error\BadResponseError;
+use OpenStack\Common\Error\BaseError;
+use OpenStack\Common\Error\NotImplementedError;
+use OpenStack\Common\Error\UserInputError;
+
+
+Class errorManagement{
+	
+	protected $app;
+	
+	
+	public function __construct($args){
+
+		$this->app = $args;
+
+	}
+	
+	public function BaseErrorHandler($error){
+		
+	}
+	
+	public function BadResponseHandler($error){
+		
+	}
+	
+	public function NotImplementedHandler($error){
+		
+	}
+	
+	public function UserInputHandler($error){
+		
+	}
+	
+	
+}
+
+?>
\ No newline at end of file
diff --git a/server/core/Identity.php b/server/core/Identity.php
index 7b6293c..1dc8373 100755
--- a/server/core/Identity.php
+++ b/server/core/Identity.php
@@ -9,7 +9,7 @@
 * 
 * @todo Complete the functions and finish the descriptions
 */
- 
+use OpenStack\Common\Error;
  
 /**
 * Identity Class of the back-end application
@@ -59,6 +59,25 @@ class identity implements Core{
 	*/
 	$credentials["addCredential"] = function(){
 		
+		$blob = $this->app->getPostParam("blob");
+		$projectId = $this->app->getPostParam("projectId");
+		$type = $this->app->getPostParam("type");
+		$userId = $this->app->getPostParam("userId");
+		
+		if(!isset($blob) || !isset($projectId) || !isset($type) || !isset($userId)){
+			$this->app->setOutput("Error", "Parameters Incorrect");
+		}
+		
+		try{
+			
+			$opt = array('blob' => $blob, 'projectId' => $projectId, 'type' => $type, 'userId' => $userId);
+			$res = $this->libClass->createCredential($opt);
+			
+		}catch(Exception $e){
+			
+		}
+		
+	]
 		
 	}
 	
@@ -82,7 +101,8 @@ class identity implements Core{
 	* @return void
 	*/
 	$credentials["showCredential"] = function(){
-		
+		$credential = $identity->getCredential('credentialId');
+$credential->retrieve();
 		
 	}
 	
@@ -94,7 +114,12 @@ class identity implements Core{
 	* @return void
 	*/
 	$credentials["updateCredential"] = function(){
-		
+		$credential = $identity->getCredential('credentialId');
+
+$credential->type = 'foo';
+$credential->blob = 'bar';
+
+$credential->update();
 		
 	}
 	
@@ -106,7 +131,8 @@ class identity implements Core{
 	* @return void
 	*/
 	$credentials["deleteCredential"] = function(){
-		
+		$credential = $identity->getCredential('credentialId');
+$credential->delete();
 		
 	}
 	
diff --git a/server/vendor/php-opencloud/openstack b/server/vendor/php-opencloud/openstack
index 15aca73..1419eb2 160000
--- a/server/vendor/php-opencloud/openstack
+++ b/server/vendor/php-opencloud/openstack
@@ -1 +1 @@
-Subproject commit 15aca73f423166c7ef8337ba08615c103c66e931
+Subproject commit 1419eb2e01164bb6b8b837df37724423907352d7