set username if not equal

fet2020/authentications/authentications.py

@@ -53,6 +53,13 @@ def authentication(username, password):
     # get member or if not then create a new member
     try:
         member = Member.objects.get(mailaccount=mail)
+
+        # set username if not equal
+        if member.username != username:
+            member.username = username
+            logger.info(f"User '{username}' saved.")
+            member.save()
+
     except Member.DoesNotExist:
         member = Member()
         member.firstname = firstname
@@ -63,12 +70,6 @@ def authentication(username, password):
         logger.info(f"Member '{username}' created.")
         member.save()
 
-    # set username if not exists
-    if not member.username:
-        member.username = username
-        logger.info(f"User '{username}' saved.")
-        member.save()
-
     logger.info(f"User '{username}' logged in.")
     return username