Feature duplicate report tag

When task manager tries to notify admin, and found out the user has been reported to admin before, via reported value, it adds (Resend) to the mail subject.

mail_config.py

@@ -31,6 +31,5 @@ Whole_mail = Head + Body
 
 UserReportHead = f"""From: {Sender_alias} <{Sender}>
 To: <{Admin_email}>
-Subject: User Creation Report:
-"""
+Subject: RC Account Creation Report: {{{{ fullname }}}}, {{{{ username }}}} """