Code:
DIM userid AS STRING
DIM password AS STRING 'Text isn't an integer. You need to use a string.
CLS
COLOR 2
PRINT "Welcome to Peter's Secure Network Login System"
PRINT "Version 1.0"
SLEEP 2
PRINT "Please enter your User ID to continue."
USERIDINPUT: 'This is a place identifier, so we can call a GOTO later.
CALL INPUT("Userid", userid) 'Comma, not semicolon
IF userid = "Peter" OR userid = "Peteriscool" THEN 'More effecient to include the OR statment and test for either password
PRINT "Please enter your password to continue."
ELSE
PRINT "Invaild Userid. Please try again."
GOTO USERIDINPUT
END IF