Remove unnecessary attributes of User struct (#17745)

* Remove unnecessary functions of User struct

* Move more database methods out of user struct

* Move more database methods out of user struct

* Fix template failure

* Fix bug

* Remove finished FIXME

* remove unnecessary code

cmd/admin.go

@@ -366,7 +366,7 @@ func runChangePassword(c *cli.Context) error {
 		return err
 	}
 
-	if err = models.UpdateUserCols(user, "passwd", "passwd_hash_algo", "salt"); err != nil {
+	if err = models.UpdateUserCols(db.DefaultContext, user, "passwd", "passwd_hash_algo", "salt"); err != nil {
 		return err
 	}