message: remove confuse example
diff: @@ -6,22 +6,9 @@ const App = () => {
  const onSubmit = data => {
  console.log(data)
  };
  - const { onChange, ...rest } = register("username");
  return (
  <form onSubmit={handleSubmit(onSubmit)}>
  - <input
  - onChange={(e) => {
  - setError("username", {
  - type: "manual",
  - message: "Dont Forget Your Username Should Be Cool!",
  - });
  - onChange(e);
  - }}
  - {...rest}
  - />
  - {errors.username && <p>{errors.username.message}</p>}
  -
  <button
  type="button"
  onClick={() => {
  