# Set up PIN and NFC sign-in

> Give a user a PIN or assign an NFC card so they can identify themselves quickly at a control surface.

PIN codes and NFC cards give people faster ways to identify themselves at a control surface than typing a full username and password each time. Both are configured per user, alongside their regular password. Before you begin Access to a user's authentication settings. For NFC: a connected surface device capable of reading NFC cards, and the physical card or fob you want to assign. Set up a PIN Open the user's authentication settings and select Set PIN (or Change PIN if one already exists). Enter a PIN of 3–20 digits, numbers only. Confirm the PIN by entering it again. To remove a PIN, select Remove PIN and confirm. The confirmation is explicit that the user won't be able to use PIN authentication afterward until a new one is set. Assign an NFC card Open the user's authentication settings and select Add NFC Card . Select which positions should listen for the scan. Scan the card on any connected surface device that supports NFC: it appears in a live Detected NFC Cards list as it's read. Optionally give the card a Card Label to tell it apart from others. Confirm the assignment. A single user can have several NFC cards assigned, but each physical card can only belong to one user at a time: assigning an already-assigned card fails until it's removed from its current owner first. Remove an NFC card Find the card in the user's list of assigned cards and select Remove , then confirm. If you get stuck What you see What to try The PIN won't save. Confirm it's 3–20 digits and numbers only, and that both entries match. A card won't scan during assignment. Confirm you're scanning on a surface device that's connected and NFC-capable, and that the position it's tied to is selected before scanning. Assigning a card fails with an "already assigned" error. Remove the card from its current user first, then assign it to the new one. A user can no longer sign in with their PIN or card. Check whether it was removed from their account, re-add it if it should still be active. Where to go next Create and manage users