The term 'hepy' is not recognized as the name of a cmdlet, function, script file, or operable program.

[AlihanRakymzhan]

Why though?? I'm having a problem to make it run, please help

I have the library installed, so I have no idea why it says that ^

[matan-h]

Do you have pip binary Scripts in your $PATH?
Check this answer about Python installed from the Microsoft Store.