Add License function in my EA

Hello!

I need an License funtion to work in my EA but this way:

I will add the amount of licenses numbers i want in the source code of my robot and for every license number it needs to have an expiration time and number of trading accounts limitations.

I need an parameter like "LicenseKey" and in the input of the parameter needs to be one of the licenses numbers with the expiration time and number of trading accounts allowed to that license that i inserted in the source code of the robot, to robot to trade. If the LicenseKey is wrong the robot dont trade and nees to give an alert in the MT4 of the person that the LicenseKey is wrong and contact the owner.

Important: The robot only works with the right License number inserted on the input of "LicenseKey" and the trading account limiations of the licences are not the trading account number but the amount of trading accounts.

Example:

A license key number with 30 days of expiration date and limited to 1 trading accounts = When the person applies the robot to the chart the robot will limit the license key to that trading account number that the person used to apply the robot to the chart.

Only coders that can do this job appy. 

Thanks in advance!