From ComputerCraft Wiki
|Lets you get input of the user.|
|Syntax||read([ char replacement [, table history [, function auto complete ]] ])|
|Returns||string The user's input|
|Prints what the user wrote.|
|Output||Whatever the user wrote.|
|Ask for a Password and lets the user enter it. The letters are hidden by '*'.|
*******Password is correct. Access granted. or Password is incorrect. Access denied.