diff --git a/workflow/engine/src/BusinessModel/OutputDocument.php b/workflow/engine/src/BusinessModel/OutputDocument.php
index d98222b33..bd604f885 100644
--- a/workflow/engine/src/BusinessModel/OutputDocument.php
+++ b/workflow/engine/src/BusinessModel/OutputDocument.php
@@ -265,9 +265,7 @@ class OutputDocument
                     $aData['OUT_DOC_PDF_SECURITY_OWNER_PASSWORD'] = \G::encrypt( $aData['OUT_DOC_PDF_SECURITY_OWNER_PASSWORD'], $aData['OUT_DOC_UID'] );
                 }
             }
-            if ($aData['OUT_DOC_UID'] == '') {
-                $outDocUid = $oOutputDocument->create($aData);
-            }
+            $outDocUid = $oOutputDocument->create($aData);
             //Return
             unset($aData["PRO_UID"]);
             $aData = array_change_key_case($aData, CASE_LOWER);
diff --git a/workflow/engine/src/BusinessModel/Task.php b/workflow/engine/src/BusinessModel/Task.php
index ba90062b4..d4dc313b9 100644
--- a/workflow/engine/src/BusinessModel/Task.php
+++ b/workflow/engine/src/BusinessModel/Task.php
@@ -984,6 +984,9 @@ class Task
     public function getTaskAssignee($sProcessUID, $sTaskUID, $sAssigneeUID)
     {
         try {
+            $filter = '';
+            $start = null;
+            $limit = null;
             $oProcess = \ProcessPeer::retrieveByPK( $sProcessUID );
             if (is_null($oProcess)) {
                 throw (new \Exception( 'This id for `prj_uid`: '. $sProcessUID .' do not correspond to a registered process'));
@@ -1530,6 +1533,9 @@ class Task
     public function getTaskAdhocAssignee($sProcessUID, $sTaskUID, $sAssigneeUID)
     {
         try {
+            $filter = '';
+            $start = null;
+            $limit = null;
             $oProcess = \ProcessPeer::retrieveByPK( $sProcessUID );
             if (is_null($oProcess)) {
                 throw (new \Exception( 'This id for `prj_uid`: '. $sProcessUID .' do not correspond to a registered process'));
diff --git a/workflow/engine/src/BusinessModel/User.php b/workflow/engine/src/BusinessModel/User.php
index 81c093b3c..ff1fc67f7 100644
--- a/workflow/engine/src/BusinessModel/User.php
+++ b/workflow/engine/src/BusinessModel/User.php
@@ -263,7 +263,16 @@ class User
             if ($form['USR_DUE_DATE'] == '') {
                 throw new \Exception('`usr_due_date`. '.\G::LoadTranslation('ID_MSG_ERROR_DUE_DATE'));
             } else {
-                $aData['USR_DUE_DATE'] = $form['USR_DUE_DATE'];
+                $dueDate = explode("-", $form['USR_DUE_DATE']);
+                if (ctype_digit($dueDate[0])) {
+                    if (checkdate($dueDate[1], $dueDate[2], $dueDate[0]) == false) {
+                        throw new \Exception('`usr_due_date`. '.\G::LoadTranslation('ID_MSG_ERROR_DUE_DATE'));
+                    } else {
+                        $aData['USR_DUE_DATE'] = $form['USR_DUE_DATE'];
+                    }
+                } else {
+                    throw new \Exception('`usr_due_date`. '.\G::LoadTranslation('ID_MSG_ERROR_DUE_DATE'));
+                }
             }
             $aData['USR_CREATE_DATE'] = date('Y-m-d H:i:s');
             $aData['USR_UPDATE_DATE'] = date('Y-m-d H:i:s');
@@ -478,25 +487,36 @@ class User
                     $aData['USR_EMAIL'] = $form['USR_EMAIL'];
                 }
             }
-            if ($form['USR_DUE_DATE'] != '') {
-                $aData['USR_DUE_DATE'] = $form['USR_DUE_DATE'];
+            if ($form['USR_DUE_DATE'] == '') {
+                throw new \Exception('`usr_due_date`. '.\G::LoadTranslation('ID_MSG_ERROR_DUE_DATE'));
+            } else {
+                $dueDate = explode("-", $form['USR_DUE_DATE']);
+                if (ctype_digit($dueDate[0])) {
+                    if (checkdate($dueDate[1], $dueDate[2], $dueDate[0]) == false) {
+                        throw new \Exception('`usr_due_date`. '.\G::LoadTranslation('ID_MSG_ERROR_DUE_DATE'));
+                    } else {
+                        $aData['USR_DUE_DATE'] = $form['USR_DUE_DATE'];
+                    }
+                } else {
+                    throw new \Exception('`usr_due_date`. '.\G::LoadTranslation('ID_MSG_ERROR_DUE_DATE'));
+                }
             }
             $aData['USR_UPDATE_DATE'] = date('Y-m-d H:i:s');
             if ($form['USR_STATUS'] != '') {
                 $aData['USR_STATUS'] = $form['USR_STATUS'];
             }
-            $oCriteria = new \Criteria('rbac');
-            $oCriteria->add(\RolesPeer::ROL_CODE, $form['USR_ROLE']);
-            $oDataset = \RolesPeer::doSelectRS($oCriteria);
-            $oDataset->setFetchmode(\ResultSet::FETCHMODE_ASSOC);
-            $oDataset->next();
-            $aRow = $oDataset->getRow();
-            if ($oDataset->getRow()){
-                $aData['USR_ROLE'] = $form['USR_ROLE'];
-            } else {
-                throw new \Exception('`usr_role`. Invalid value for field.');
-            }
             if ($form['USR_ROLE'] != '') {
+                $oCriteria = new \Criteria('rbac');
+                $oCriteria->add(\RolesPeer::ROL_CODE, $form['USR_ROLE']);
+                $oDataset = \RolesPeer::doSelectRS($oCriteria);
+                $oDataset->setFetchmode(\ResultSet::FETCHMODE_ASSOC);
+                $oDataset->next();
+                $aRow = $oDataset->getRow();
+                if ($oDataset->getRow()){
+                    $aData['USR_ROLE'] = $form['USR_ROLE'];
+                } else {
+                    throw new \Exception('`usr_role`. Invalid value for field.');
+                }
                 $this->updateUser($aData, $form['USR_ROLE']);
             } else {
                 $this->updateUser($aData);
@@ -548,7 +568,23 @@ class User
     }
 
     /**
-     * Delete Group
+     * Authenticate User
+     *
+     * @param array  $arrayData Data
+     *
+     * return array Return data of the User updated
+     */
+    public function authenticate($arrayData)
+    {
+        try {
+
+        } catch (\Exception $e) {
+            throw $e;
+        }
+    }
+
+    /**
+     * Delete User
      *
      * @param string $usrUid Unique id of User
      *
@@ -613,6 +649,7 @@ class User
     public function getUsers($filter, $start, $limit)
     {
         try {
+            $aUserInfo = array();
             require_once (PATH_TRUNK . "workflow" . PATH_SEP . "engine" . PATH_SEP . "classes" . PATH_SEP . "model" . PATH_SEP . "Users.php");
             $oCriteria = new \Criteria();
             if ($filter != '') {
@@ -653,13 +690,14 @@ class User
     /**
      * Get data of a User
      *
-     * @param string $userUid Unique id of Group
+     * @param string $userUid Unique id of User
      *
      * return array Return an array with data of a User
      */
     public function getUser($userUid)
     {
         try {
+            $aUserInfo = array();
             $oUser = \UsersPeer::retrieveByPK($userUid);
             if (is_null($oUser)) {
                 throw (new \Exception( 'This id for `usr_uid`: '. $userUid .' do not correspond to a registered user'));
diff --git a/workflow/engine/src/Services/Api/ProcessMaker/Project/OutputDocuments.php b/workflow/engine/src/Services/Api/ProcessMaker/Project/OutputDocuments.php
index 7a007ff0e..9132562d6 100644
--- a/workflow/engine/src/Services/Api/ProcessMaker/Project/OutputDocuments.php
+++ b/workflow/engine/src/Services/Api/ProcessMaker/Project/OutputDocuments.php
@@ -90,8 +90,7 @@ class OutputDocuments extends Api
         } catch (\Exception $e) {
             //response
             throw new RestException(Api::STAT_APP_EXCEPTION, $e->getMessage());
-        }
-        return $response;
+        }        
     }
 
     /**
diff --git a/workflow/engine/src/Services/Api/ProcessMaker/User.php b/workflow/engine/src/Services/Api/ProcessMaker/User.php
index d5f733d33..c72202a30 100644
--- a/workflow/engine/src/Services/Api/ProcessMaker/User.php
+++ b/workflow/engine/src/Services/Api/ProcessMaker/User.php
@@ -14,7 +14,7 @@ class User extends Api
     /**
      * @url GET
      */
-    public function index($filter = '', $start = null, $limit = null)
+    public function doGetUsers($filter = '', $start = null, $limit = null)
     {
         try {
             $user = new \BusinessModel\User();
@@ -30,7 +30,7 @@ class User extends Api
      *
      * @param string $usr_uid {@min 32}{@max 32}
      */
-    public function doGet($usr_uid)
+    public function doGetUser($usr_uid)
     {
         try {
             $user = new \BusinessModel\User();
@@ -48,7 +48,7 @@ class User extends Api
      *
      * @status 201
      */
-    public function doPost($request_data) {
+    public function doPostUser($request_data) {
         try {
             $user = new \BusinessModel\User();
             $arrayData = $user->create($request_data);
@@ -59,13 +59,30 @@ class User extends Api
         }
     }
 
+    /**
+     * @url POST /:usr_uid
+     *
+     * @param array $request_data
+     *
+     */
+    public function doPostAuthenticate($request_data) {
+        try {
+            $user = new \BusinessModel\User();
+            $arrayData = $user->authenticate($request_data);
+            $response = $arrayData;
+            return $response;
+        } catch (\Exception $e) {
+            throw (new RestException(Api::STAT_APP_EXCEPTION, $e->getMessage()));
+        }
+    }
+
     /**
      * @url PUT /:usr_uid
      *
      * @param string $usr_uid      {@min 32}{@max 32}
      * @param array  $request_data
      */
-    public function doPut($usr_uid, $request_data) {
+    public function doPutUser($usr_uid, $request_data) {
         try {
             $userLoggedUid = $this->getUserId();
             $user = new \BusinessModel\User();
@@ -82,7 +99,7 @@ class User extends Api
      *
      * @param string $usr_uid {@min 32}{@max 32}
      */
-    public function doDelete($usr_uid)
+    public function doDeleteUser($usr_uid)
     {
         try {
             $user = new \BusinessModel\User();