{
  handler: async (c, next) => {
    const authHeader = c.req.header('Authorization');
    if (!authHeader || !authHeader.startsWith('Bearer ')) {
      return new Response('Unauthorized', { status: 401 });
    }
 
    const token = authHeader.split(' ')[1];
    // Validate token here
 
    await next();
  },
  path: '/api/*',
}