cloud function firebase query help

const functions = require('firebase-functions');
const admin = require('firebase-admin');
// To avoid deployment errors, do not call admin.initializeApp() in your code

exports.teamJoinNotification = functions.region('europe-west2').
	runWith({
		memory: '128MB'
  }).https.onCall(
  (data, context) => {
		const teamRef = data.teamRef;
		const userRef = data.userRef;
    // Write your code below!
try {
      const firestore = admin.firestore();
      const querySnaphost = firestore.collection('Teams').where("TeamCode","==" ,"YJ-2024042510").get();
      
      const TeamManagers = [];

      //Should only be 1 Team value
      //Assign doc ref list to TeamManagers
      querySnaphost.docs.Map(function(doc){
        TeamManagers = doc.Managers;
      });

      console.log("Team Managers: " + TeamManagers);


      //For each manager in list Get UsedID and add a UserTask. 
      for(manger in TeamManagers){
        const UserId = "";
        var now = DateTime.now();

        //Get user associtaed to teamManager ref
        var querySnaphostUser = firestore.collection('users').where("TeamManagerDocRef","==" , manger).get();

        querySnaphostUser.docs.Map(function(doc){
          UserId = doc.id;
          });
        var newUserTask = {'user_ref': UserId, 'task_title': "New Team Member", "task_desc": "Team member has joined", "IsActive": true, "CreationDate": now};

        var collection = firestore.collection('UserTasks');
        collection 
          .add(newUserTask) // <-- Your data
          .then((_) => console.log('Added User Task'))
          .catchError((error) => console.log('Add failed: $error'));
      }

      console.log('finished');    
      return 'Hello Team';

    }
    catch (error){
      console.log(error);
    }
    // Write your code above!
		return 'Error';
  }
);