Go to your search bar, type netplwiz and click on it, untick must enter password to use this computer, type it in once click ok, close the window. Job done.
More ideas here:
Windows 10 keeps asking me to create a PIN [SOLVED]
https://windowsreport.com/windows-10-asking-create-pin/#:~:text=Now%2C%20in%20Windows%20Security%2C%20in,of%20doing%20that%20click%20Dismiss.
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