further refactored user login

cps/MyLoginManager.py

@@ -21,9 +21,10 @@
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
 
-from flask_login import LoginManager
-from flask import session
-
+from flask_login import LoginManager, confirm_login
+from flask import session, current_app
+from flask_login.utils import decode_cookie
+from flask_login.signals import user_loaded_from_cookie
 
 class MyLoginManager(LoginManager):
     def _session_protection_failed(self):
@@ -33,3 +34,18 @@ class MyLoginManager(LoginManager):
                              and _session.get('csrf_token', None))) and ident != _session.get('_id', None):
             return super(). _session_protection_failed()
         return False
+
+    def _load_user_from_remember_cookie(self, cookie):
+        user_id = decode_cookie(cookie)
+        if user_id is not None:
+            session["_user_id"] = user_id
+            session["_fresh"] = False
+            user = None
+            if self._user_callback:
+                user = self._user_callback(user_id)
+            if user is not None:
+                app = current_app._get_current_object()
+                user_loaded_from_cookie.send(app, user=user)
+                confirm_login()
+                return user
+        return None