If you were a student with NWCCD within the past two years or you had to reapply in Recruit, the system may not have sent a activation PIN because your account is still active.
Try using the NWCCD Hub Account Services forgot password page to reset your password.
https://activation.sheridan.edu/Students/ForgotPassword
If you weren't a prior student with NWCCD and didn't receive your activation PIN, contact Student Services. For Sheridan call (307) 675-0100 and for Gillette call (307) 681-6000.