What have you tried?
Show us.

PM exists to help you learn; not to write your code for you.

While cargo-culting code from the Monastery is probably a common occurance, modifying it to suit your own requirements is your responsibility.

Nonetheless, here's a hint: ascertaining where to place a snippet on this order:

if (condition){
    print "log...";
} else { 
    print "negative login...."; 
}
[download]

would worth considering.

Come back to show us some code... and some effort... and we'll almost certainly provide more specific help.