fix new nullability issue

Author: Strum355

client/web/src/enterprise/executors/secrets/SecretAccessLogsModal.tsx

@@ -77,13 +77,10 @@ const ExecutorSecretAccessLogNode: React.FunctionComponent<React.PropsWithChildr
         <div className="d-flex justify-content-between align-items-center flex-wrap mb-0">
             <PersonLink
                 person={{
-                    displayName: node.user.displayName || node.user.username,
-                    email: node.user.email,
-                    user: {
-                        displayName: node.user.displayName,
-                        url: node.user.url,
-                        username: node.user.username,
-                    },
+                    // empty strings are fine here, as they are only used when `user` is not null
+                    displayName: (node.user?.displayName || node.user?.username) ?? '',
+                    email: node.user?.email ?? '',
+                    user: node.user,
                 }}
             />
             <Timestamp date={node.createdAt} />