Explore the Link Authentication Element
Create a single email input for both email collection and Link authentication.
Create a single email input for both email collection and Link authentication by adding the Link Authentication Element to your Elements integration. If your customer doesn’t have a Link account, and they select one of its supported payment methods (credit card, debit card, or US bank), they’re given the option of signing up.
Alternatively, if your customer already has a Link account, it authenticates them with a one-time-password, then automatically fills their payment details in the Payment Element.
Use the Link Authentication Element as part of your checkout page
Add the Link Authentication Element
Put the Link Authentication Element at the beginning of the checkout page, followed by the Address Element (optional), then the Payment Element. The following code creates an instance of the Link Authentication Element and mounts it to the DOM: