Change team/project ownership to user.

change_project_owner.js

var EMAIL = '';
var PROJECTID = '';
db.projects.find({name: 'formio'}).forEach(function(project) {
  db.forms.find({name: 'user', project: project._id}).forEach(function(userForm) {
    print("User Form: " + userForm._id);
    db.submissions.find({'data.email': EMAIL, form: userForm._id}).forEach(function(user) {
      if (user) {
        print("User: " + user._id);
        db.projects.find({_id: ObjectId(PROJECTID)}).forEach(function(changeProject) {
          if (changeProject) {
            print("Changing project " + PROJECTID + " owner to " + user._id);
            db.projects.updateOne({_id:changeProject._id}, {$set: {owner: user._id}});
          }
        });
      }
      else {
        print("User not found");
      }
    });
  });
});

change_team_owner.js

var USERNAME = '';
var TEAMS = [];
db.projects.find({name: 'formio'}).forEach(function(project) {
  db.forms.find({name: 'user', project: project._id}).forEach(function(userForm) {
    print("User Form: " + userForm._id);
    db.submissions.find({'data.name': USERNAME, form: userForm._id}).forEach(function(user) {
      if (user) {
        print("User: " + user._id);
        TEAMS.forEach(function(teamId) {
          print("Updating team " + teamId + " to owner " + user._id);
          db.submissions.updateOne({_id: ObjectId(teamId)}, {$set: {owner: user._id}});
        });
      }
      else {
        print("User not found");
      }
    });
  });
});