我试图连接前端登录页面到后端mongodb。我得到如下所述的错误。此代码从前端获取数据，并发送后端的注册标记。

name: "",
    email: "",
  });

  let name, value;
  const handleInputs = (e) => {
    console.log(e);
    name = e.target.name;
    value = e.target.value;

    setuser({ ...user, [name]: value });
  };

  const PostData = async (e) => {
    e.preventDefault();
    // http://localhost:3002/register
    const [name, email] = user;
    console.log(name);
    console.log(email);
    const res = await fetch("/register", {
      method: "POST",
      headers: {
        "Content-Type": "application/json",
      },
      body: JSON.stringify({
        name,
        email,
      }),
    });
    const data = await res.json();
    console.log(name);
    console.log(email);
    if (data.status === 422 || !data) {
      window.alert("Invalid Registeration");
    } else {
      window.alert(" Registeration Successfull");
    }
  };

错误信息：

Uncaught (in promise) TypeError: user is not iterable at PostData (App.js:30:1) at HTMLUnknownElement.callCallback (react-dom.development.js:4164:1) at Object.invokeGuardedCallbackDev (react-dom.development.js:4213:1) at invokeGuardedCallback (react-dom.development.js:4277:1) at invokeGuardedCallbackAndCatchFirstError (react-dom.development.js:4291:1) at executeDispatch (react-dom.development.js:9041:1) at processDispatchQueueItemsInOrder (react-dom.development.js:9073:1)

at processDispatchQueue (react-dom.development.js:9086:1) at dispatchEventsForPlugins (react-dom.development.js:9097:1) at react-dom.development.js:9288:1