Send hashed passwords to wp_insert_user to avoid passord change notifications on login

GaltinnAuth.php

@@ -73,11 +73,12 @@ class GaltinnAuth {
         }
         /* Update data */
         $userdata['ID'] = $existing_user->ID;
+        $userdata['user_pass'] = wp_hash_password($password);
 
-        $updated_user_id = wp_update_user($userdata);
+        $updated_user_id = wp_insert_user($userdata);
         if (is_wp_error($updated_user_id)) {
             error_log("[error] " . $updated_user_id->get_error_message() . "(username: $username)");
         }
         return get_user_by('id', $updated_user_id);
     }
-}
+}