gistfile1.txt

import {useDispatch, useSelector} from 'react-redux'

const Header = ()=> {
  const user = useSelector((state) => state.username);
  const dispatch = useDispatch();

  return (
    <div>{user}
    <button onClick={()=> dispatch({type: "updateUser"})}>Change User</button>
    </div>
  )
}

export default Header