Notifier bot v1.1

Additional commands:

• Upcoming birthdays
• Admin commands to change names and promote users

Improvements:

• Dynamic creation of /HELP message
• Various bug fixes and code improvements

Notifier bot

Basic abilities:

• Start/Help - show available commands with inline keyboard
• Token - show user token

Authorized user abilities:

• Get - get customer overdue debts
• Schedule - set scheduled messages
• Clear schedule - clear current schedule
• Get schedule - show schedule info

Admin abilities:

• Admin message - notify all bot users
• Admin time - shows bot server time