'X' Marks The Spot IV - Y is relevant too

I'm afraid you'll need the username and password before you can continue. Nothing is too easy on an 'X' cache, but I have provided a hint for each one below, which should help you to work out what they are.

 

Enter username:  
Enter password:        

 

USERNAME HINT:  The inventor's middle name

PASSWORD HINT:  Inventors invent inventions