diff --git a/dislocker_auth.py b/dislocker_auth.py
index 0c08fcd..0f1472e 100644
--- a/dislocker_auth.py
+++ b/dislocker_auth.py
@@ -66,34 +66,41 @@ class Auth():
             pc_uuid = str(kwargs["pc_uuid"])
             pc_token = str(kwargs["pc_token"])
             if "device_list" in kwargs:
-                device_list = kwargs["device_list"]
+                if kwargs["device_list"] == []:
+                    device_list = None
+                else:
+                    device_list = kwargs["device_list"]
             else:
-                pass
-            keyboard_number = "own"
-            mouse_number = "own"
+                device_list = None
+
+            keyboard_number = 0
+            mouse_number = 0
 
             if "password_hash" in kwargs:
                 password_hash = str(kwargs["password_hash"])
                 cursor.execute("SELECT * FROM pc_list WHERE pc_number = %s AND password_hash = %s AND pc_uuid = %s AND pc_token = %s", (pc_number, password_hash, pc_uuid, pc_token))
                 pc_info = cursor.fetchall()
                 if pc_info:
-                    for device in device_list:
-                        cursor.execute("SELECT * FROM keyboard_list WHERE device_instance_path = %s", (device["device_instance_path"],))
-                        keyboard_record = cursor.fetchall()
-                        if keyboard_record:
-                            keyboard_number = int(keyboard_record[0][0])
-                            break
-                        else:
-                            pass
-                    
-                    for device in device_list:
-                        cursor.execute("SELECT * FROM mouse_list WHERE device_instance_path = %s", (device["device_instance_path"],))
-                        mouse_record = cursor.fetchall()
-                        if mouse_record:
-                            mouse_number = int(mouse_record[0][0])
-                            break
-                        else:
-                            pass
+                    if device_list == None:
+                        pass
+                    else:
+                        for device in device_list:
+                            cursor.execute("SELECT * FROM keyboard_list WHERE device_instance_path = %s", (device["device_instance_path"],))
+                            keyboard_record = cursor.fetchall()
+                            if keyboard_record:
+                                keyboard_number = int(keyboard_record[0][0])
+                                break
+                            else:
+                                pass
+                        
+                        for device in device_list:
+                            cursor.execute("SELECT * FROM mouse_list WHERE device_instance_path = %s", (device["device_instance_path"],))
+                            mouse_record = cursor.fetchall()
+                            if mouse_record:
+                                mouse_number = int(mouse_record[0][0])
+                                break
+                            else:
+                                pass
 
                     return {"result": 0, "about": "ok", "output_dict": {"keyboard_number": keyboard_number, "mouse_number": mouse_number}}
                 else: