Added header in network request using AFNetworking not working

Question

I use the following code to make a GET request including a header Authorization but does not seem to work...the get request does not include the authorization token. Any ideas?

   // 1 - define resource URL
    
    NSURL *URL = [NSURL URLWithString:@"https://myurl"];
    
    AFHTTPSessionManager *manager = [[AFHTTPSessionManager alloc]initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
    AFHTTPRequestSerializer *requestSerializer = [AFHTTPRequestSerializer serializer];
    [requestSerializer setValue:[NSString stringWithFormat:@"Bearer %@",Token] forHTTPHeaderField:@"Authorization"];
    
   manager.requestSerializer = requestSerializer;

    //3 - set a body
    NSDictionary *body =@{@"email":@"a@gmail.com"};
    //4 - create request
    [manager GET:URL.absoluteString
       parameters:body
       
         progress:nil
     //5 - response handling
          success:^(NSURLSessionDataTask * _Nonnull task, NSDictionary *responseObject) {
        
            NSLog(@"Reply POST JSON: %@", responseObject);

    }
          failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        NSLog(@"error on machine token: %@", error);
    }
    ];