Android tablet shut down and is asking for a pin or something

[a9431992b]

While trying to tether my Android phone to my Android tablet,i got as far as entering my username and password,when it shut down.now it shows a window on the screen asking me to enter something.what do I enter?

 

[webworkings]

There is no way to know what it is you need to enter if you don't tell us what it is asking you for. So, what is it asking you?