I have an error while parsing json data over internet in flutter

This is my code and i am having an error in the "builder": while opening the curly braces it shows error like

The body might complete normally, causing ‘null’ to be returned, but the return type, ‘Widget’, is a potentially non-nullable type.
Try adding either a return or a throw statement at the end.

import 'dart:async';
import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      home: Mydata(),
    );
  }
}

class Mydata extends StatefulWidget {
  const Mydata({super.key});

  @override
  State<Mydata> createState() => _MydataState();
}

class _MydataState extends State<Mydata> {
  Future<List<String>> ebdetails() async {
    var response =
        await http.get(Uri.parse('http://117.247.181.113:8000/eb/1'));
    return jsonDecode(response.body);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.white,
      appBar: AppBar(
        elevation: 0,
        centerTitle: true,
        title: const Text(
          'Json Datas',
          style: TextStyle(
            color: Colors.black,
          ),
        ),
        backgroundColor: Colors.white,
      ),
      body: Center(
        child: FutureBuilder(
          builder: (context, snapshot) {
            if (!snapshot.hasData) {
              return const Center(
                child: Text('Data Ok'),
              );
            } else if (snapshot.hasError) {
              return const Center(
                child: Text('Data Error'),
              );
            } else if (snapshot.hasData) {
              return Center(
                  child: ListView.builder(
                itemCount: snapshot.data!.length,
                itemBuilder: (context, index) {
                  return Container(
                    child: ListTile(
                      title: Text(
                        snapshot.data![index],
                      ),
                    ),
                  );
                },
              ));
            }
          },
          future: ebdetails(),
        ),
      ),
    );
  }
}

I have pasted the error line below for reference
at the end while opening curly braces it shows error

builder: (context, snapshot) {