diff --git a/src/API/APIUser.php b/src/API/APIUser.php
index c7826e6..5e185f5 100644
--- a/src/API/APIUser.php
+++ b/src/API/APIUser.php
@@ -5,12 +5,14 @@ namespace WebProjectFitness\API;
 use WebProjectFitness\Model\BDTables;
 use WebProjectFitness\Model\Model;
 
-class APIUser extends API {
+class APIUser extends API
+{
 
     private $declaredFunctions = [
         'create' => [
             'method' => 'POST',
-            'params' => []
+            'params' => [
+            ]
         ],
         'modify' => [
             'method' => 'POST',
@@ -103,58 +105,73 @@ class APIUser extends API {
                 ]
             ]
         ]
+
+
     ];
 
-    public function __construct() {
-        parent::__construct( $this->declaredFunctions );
+    public function __construct()
+    {
+        parent::__construct($this->declaredFunctions);
     }
 
 
     //functions for user table.
-    public function create() {
-        $id = uniqid();
-        $id = substr( $id, 0, 6 );
-        Model::insert( BDTables::USER, [
+    public function create($data)
+    {
+        $bytes = null;
+        if (function_exists("random_bytes")) {
+            $bytes = random_bytes(ceil(6 / 2));
+        } elseif (function_exists("openssl_random_pseudo_bytes")) {
+            $bytes = openssl_random_pseudo_bytes(ceil(6 / 2));
+        }
+        $id = substr(bin2hex($bytes), 0, 6);
+        Model::insert(BDTables::USER, [
             "name" => "",
             "user_id" => $id
-        ] );
-        $this->returnJson( [ 'id' => $id ] );
+        ]);
+        $this->returnJson(['id' => $id]);
     }
 
-    public function modify( $data ) {
-        Model::update( BDTables::USER, [ 'name' => $data[ 'name' ] ], "user_id", $data[ 'user_id' ] );
-        $this->returnJson( [ 'name' => $data[ 'name' ], 'id' => $data[ 'user_id' ] ] );
+    public function modify($data)
+    {
+        Model::update(BDTables::USER, ['name' => $data['name']], "user_id", $data['user_id']);
+        $this->returnJson(['name' => $data['name'], 'id' => $data['user_id']]);
     }
 
 
     //Functions for favorite table.
-    public function favoriteAdd( $data ) {
-        Model::insert( BDTables::FAVORITE, [ 'id_user' => $data[ 'id_user' ], 'id_exercise' => $data[ 'id_exercise' ] ] );
-        $this->returnJson( [ 'id_user' => $data[ 'id_user' ], 'id_exercise' => $data[ 'id_exercise' ] ] );
+    public function favoriteAdd($data)
+    {
+        Model::insert(BDTables::FAVORITE, ['id_user' => $data['id_user'], 'id_exercise' => $data['id_exercise']]);
+        $this->returnJson(['id_user' => $data['id_user'], 'id_exercise' => $data['id_exercise']]);
     }
 
-    public function favoriteDelete( $data ) {
-        Model::delete( BDTables::FAVORITE, [ 'id_user' => $data[ 'id_user' ], 'id_exercise' => $data[ 'id_exercise' ] ] );
-        $this->returnJson( [ 'id_user' => $data[ 'id_user' ], 'id_exercise' => $data[ 'id_exercise' ] ] );
+    public function favoriteDelete($data)
+    {
+        Model::delete(BDTables::FAVORITE, ['id_user' => $data['id_user'], 'id_exercise' => $data['id_exercise']]);
+        $this->returnJson(['id_user' => $data['id_user'], 'id_exercise' => $data['id_exercise']]);
 
     }
 
     //functions for training table
-    public function trainingAdd( $data ) {
-        Model::insert( BDTables::TRAINING, [ 'id_user' => $data[ 'id_user' ], 'id_exercise' => $data[ 'id_exercise' ], 'id_order' => $data[ 'id_order' ] ] );
-        $this->returnJson( [ 'id_user' => $data[ 'id_user' ], 'id_exercise' => $data[ 'id_exercise' ], 'id_order' => $data[ 'id_order' ] ] );
+    public function trainingAdd($data)
+    {
+        Model::insert(BDTables::TRAINING, ['id_user' => $data['id_user'], 'id_exercise' => $data['id_exercise'], 'id_order' => $data['id_order']]);
+        $this->returnJson(['id_user' => $data['id_user'], 'id_exercise' => $data['id_exercise'], 'id_order' => $data['id_order']]);
     }
 
-    public function trainingDelete( $data ) {
-        Model::delete( BDTables::TRAINING, [ 'id_user' => $data[ 'id_user' ], 'id_exercise' => $data[ 'id_exercise' ], 'id_order' => $data[ 'id_order' ] ] );
+    public function trainingDelete($data)
+    {
+        Model::delete(BDTables::TRAINING, ['id_user' => $data['id_user'], 'id_exercise' => $data['id_exercise'], 'id_order' => $data['id_order']]);
 
-        $this->returnJson( [ 'id_user' => $data[ 'id_user' ], 'id_exercise' => $data[ 'id_exercise' ], 'id_order' => $data[ 'id_order' ] ] );
+        $this->returnJson(['id_user' => $data['id_user'], 'id_exercise' => $data['id_exercise'], 'id_order' => $data['id_order']]);
     }
 
-    public function trainingChangeOrder( $data ) {
-        Model::update_order( BDTables::TRAINING, [ 'id_user' => $data[ 'id_user' ], 'id_order' => $data[ 'id_order' ], 'id_exercise' => $data[ 'id_exercise' ] ], $data[ 'new_order' ] );
+    public function trainingChangeOrder($data)
+    {
+        Model::update_order(BDTables::TRAINING, ['id_user' => $data['id_user'], 'id_order' => $data['id_order'], 'id_exercise' => $data['id_exercise'] ], $data['new_order']);
 
-        $this->returnJson( [ 'id_user' => $data[ 'id_user' ], 'id_exercise' => $data[ 'id_exercise' ], 'id_order' => $data[ 'id_order' ], 'new_order' => $data[ 'new_order' ] ] );
+        $this->returnJson(['id_user' => $data['id_user'], 'id_exercise' => $data['id_exercise'], 'id_order' => $data['id_order'], 'new_order' => $data['new_order']]);
     }
 
 }
\ No newline at end of file