MagicLinkAuthMethod: do not interrupt auth with used magic links

src/auth/magic_link/MagicLinkAuthMethod.ts

@@ -49,6 +49,7 @@ export default class MagicLinkAuthMethod implements AuthMethod<MagicLink> {
     public async interruptAuth(req: Request, res: Response): Promise<boolean> {
         const pendingLink = await MagicLink.select()
             .where('session_id', req.getSession().id)
+            .where('used', 0)
             .first();
 
         if (pendingLink) {