login Passport with email and password and passing id user as parameter in get

Question

I am creating a website in React, Nodejs and Mongodb for a course project and I have a question in my login.

My login prompts email and password to the user, but I created my method on the front that calls the get based on the id user because it is the variable that I use in aggregation with my database to fetch your Roster work. I put a id test to verify and works well, but I need to know how to get this value id of my backend.

It would be necessary to make another aggregate?

Follow the code on my frontend:

<button onClick={getRosterByUser}>roster</button>

const getRosterByUser = () => {
  Axios({
    method: 'GET',
    withCredentials: true,
    url: `http://localhost:4000/roster/5fd778b02e61463ea46eadf9`
  }).then((res) => {
    setRoster(res.data);
    console.log(res.data);
  });
};    

Code of the backend:

app.get('/roster/:_id', (req, res) => {
  const _id = req.params._id;

  Roster.aggregate(
    [
      {
        $match: {
          userId: objectId(_id)
        }
      },
      { $unwind: '$week' },
      {
        $lookup: {
          from: 'store',
          localField: 'week.store_id',
          foreignField: '_id',
          as: 'user_roster'
        }
      },
      {
        $project: {
          week: 1,
          roster: {
            $arrayElemAt: ['$user_roster', 0]
          }
        }
      }
    ],
    function (err, doc) {
      console.log(err);
      res.send(doc);
    }
  );
});