Hello Zeth Adams,
Just to clarify — your PIN isn't something that can be looked up or retrieved, it can only be reset. The good news is that's straightforward to do.
On the sign-in screen, select Sign-in options just below the PIN entry field, then choose to sign in with your Microsoft account password instead. Once you're logged in, go to Settings > Accounts > Sign-in options > PIN (Windows Hello) and you can set a new one from there.
If you don't see the password option or you're using a local account, let me know and I can walk you through the alternative steps.
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