Passwordless: link to UserPool overrides page (#8170)

Author: siegerts

src/pages/[platform]/build-a-backend/auth/concepts/passwordless/index.mdx

@@ -42,6 +42,8 @@ Passwordless authentication removes the security risks and user friction associa
 
 </Callout>
 
+Learn how to implement passwordless sign-in flows by [overriding the Cognito UserPool to enable the sign-in methods below](/[platform]/build-a-backend/auth/modify-resources-with-cdk/#override-cognito-userpool-to-enable-passwordless-sign-in-methods).
+
 {/* need a section about what a "preferred" factor is */}
 
 ## SMS OTP