Deleting a user is returning nothing in the backend

I’m trying to delete an user, but the req.body in the backend is an empty object.

In the backend I have the following code:

const deleteUser = async (req, res) => {
  console.log(req.body);
  console.log(req.config);
  const user = await User.findById(req.body.userId);
  if (user) {
    const deleteUser = await user.remove();
    res.send({ message: "User Deleted", user: deleteUser });
  } else {
    res.status(404).send({ message: "User Not Found" });
  }
};

Here the console log is an empty object, I must that the other functions work perfectly.

In the frontend, I’m using redux, I think I’m doing something wrong in the actions, but I can’t find out what, I will post all my code for reference.

action.js:

export const deleteUser = (userId) => async (dispatch, getState) => {
  dispatch({ type: USER_DELETE_REQUEST, payload: userId });
  try {
    const { data } = await Axios.delete(
      "http://localhost:3030/v1/user/userProfile/deleteUser",
      {
        userId: userId,
      }
    );
    dispatch({ type: USER_DELETE_SUCCESS, payload: data });
  } catch (error) {
    const message =
      error.response && error.response.data.message
        ? error.response.data.message
        : error.message;
    dispatch({ type: USER_DELETE_FAIL, payload: message });
  }
};

In the reducer:

export const userDeleteReducer = (state = {}, action) => {
switch (action.type) {
case USER_DELETE_REQUEST:
return { loading: true };
case USER_DELETE_SUCCESS:
return { loading: false, success: true };
case USER_DELETE_FAIL:
return { loading: false, error: action.payload };
default:
return state;
}
};

And I’m calling the action like that:

const userSignin = useSelector((state) => state.userSignin);
const { userInfo, loading, error } = userSignin;

<button
              onClick={() => {
                console.log(userInfo._id);
                dispatch(deleteUser(userInfo._id));
                props.onClose();
              }}
              className='deleteAccountModalButton'
            >
              Delete account!
            </button>

I tried everything, but I can’t find where the problem, can somebody tell me why the req.body is empty in the backend?