How to create a password login through a userform

Hi, i'm trying to create a password login userform after clicking on the command button into a sheet.

Firstly where i will be at the main page and i am suppose to click on the "staff access"
Step 1.jpg

Then a userform will be prompt and ask for password
Step 2.jpg

After getting the correct password, it will then move on the the specific sheet
Step 3.jpg

"StaffPage" (Sheet name for step 3)
"txtPassword" (textbox for step 2)

Sorry for the brief description