[Enhancement] Move CRON Web Interface Credentials Information to Class 'AppConfig'

[usernane]

Problem

Currently, the password which is used to login to CRON Web Interface must be hashed first and then set using the method Cron::password() manually. For normal people, this can be annoying task as it must be performed manually.

Suggested Solution

Since the password can be configured, why not to store it in the class AppConfig to make it part of the application configuration variables? If we do that, then it is possible later on to set the password using CLI commands.