diff --git a/src/auth/AuthGuard.ts b/src/auth/AuthGuard.ts
index 0ea3827..c24fde9 100644
--- a/src/auth/AuthGuard.ts
+++ b/src/auth/AuthGuard.ts
@@ -160,6 +160,9 @@ export default class AuthGuard {
             throw new PendingApprovalAuthError();
         }
 
+        // Mark auth proof as used
+        await proof.use?.();
+
         // Login
         session.isAuthenticated = true;
         session.persistent = persistSession;
diff --git a/src/auth/AuthProof.ts b/src/auth/AuthProof.ts
index 960d119..e868f95 100644
--- a/src/auth/AuthProof.ts
+++ b/src/auth/AuthProof.ts
@@ -38,4 +38,10 @@ export default interface AuthProof<R> {
      * instance.
      */
     revoke(): Promise<void>;
+
+    /**
+     * This method is called when the AuthProof was used in a successful login attempt.
+     * If you modify the AuthProof, you should make sure changes are persistent.
+     */
+    use?(): Promise<void>;
 }
diff --git a/src/auth/magic_link/MagicLinkController.ts b/src/auth/magic_link/MagicLinkController.ts
index 8639e05..402662f 100644
--- a/src/auth/magic_link/MagicLinkController.ts
+++ b/src/auth/magic_link/MagicLinkController.ts
@@ -141,7 +141,7 @@ export default class MagicLinkController<A extends Application> extends Controll
         }
 
         if (await validLink.isAuthorized()) {
-            validLink.use();
+            validLink.useLink();
             await validLink.save();
             await this.performAction(validLink, req, res);
             return;
diff --git a/src/auth/models/MagicLink.ts b/src/auth/models/MagicLink.ts
index b9c5d1b..34845be 100644
--- a/src/auth/models/MagicLink.ts
+++ b/src/auth/models/MagicLink.ts
@@ -62,7 +62,7 @@ export default class MagicLink extends Model implements AuthProof<User> {
         return this.used;
     }
 
-    public use(): void {
+    public useLink(): void {
         this.used = true;
     }