Delete user working from user table (#1938)

Comment in helper

cps/helper.py

@@ -795,8 +795,8 @@ def tags_filters():
 # checks if domain is in database (including wildcards)
 # example SELECT * FROM @TABLE WHERE  'abcdefg' LIKE Name;
 # from https://code.luasoftware.com/tutorials/flask/execute-raw-sql-in-flask-sqlalchemy/
+# in all calls the email address is checked for validity
 def check_valid_domain(domain_text):
-    # domain_text = domain_text.split('@', 1)[-1].lower()
     sql = "SELECT * FROM registration WHERE (:domain LIKE domain and allow = 1);"
     result = ub.session.query(ub.Registration).from_statement(text(sql)).params(domain=domain_text).all()
     if not len(result):