want to create a seperate member route

Suppose in the listing(includes other attributes like title, price as well) i give a set of 20 members with their name and phone number.I need to automatically check whether these members already exists in the member list, if they exist then add return the price of the listing else add the member to the member list.
I am not able to define a particular schema for member model whether array or string or key value pair for member name and member phone number.if i define also i am not able to retrieve it from the database and compare it
So basically i want a member list like member 1 member2 … and when i create the listing these listing members should get compared with the members are return price if they exist else create a new member with that particular name and phone number

listing model

    const listingSchema = new Schema({
    title: { type: String },
    price: { type: Number },
    startDate: {
      type: Date,
    },
    currentMonth: { type: Number },
    endDate: {
      type: Date,
    },

    member: { type: String },
    phone: { type: Number },
    });

member model

    const memberSchema = new Schema({
      member: "String",
      phone: "Number",
    });

listing controller

    const newListing = new listing({
      title: req.body.title,
      price: req.body.price,
      startDate: req.body.startDate,
      currentMonth: req.body.currentMonth,
      endDate: req.body.endDate,
    member: req.body.member,
    });

    let member = newListing.member;
    // console.log(member);
    let present = await members.findOne([member]);
    console.log(present);

    member.forEach(async (e) => {
      // console.log(e);
      let existingMember = await members.findOne({ name: e });
      if (existingMember) {
        console.log("yes");
        console.log(req.body.price)
      } else {
        console.log("no");
        //createmember;
      }
    });

member.controller

    try {
    const newMember = new member({
      member: [{ name: req.body.name, phone: req.body.phone }],
    });
    console.log(newMember);
    // let savedMember = await newMember.save();
    // console.log(savedMember);
    return res.json({ message: "New Members Created!" });
    } catch (error) {
    console.log(error);
    res.status(404).json(error, "cannot create new member");
    }