Adding new Entry to every existing User

Questions and Answers
1
System Information
  • Strapi Version: 3.6.2
  • Operating System: Mac/Windows
  • Database: sqLite
  • Node Version: v10.16.0
  • NPM Version: 6.9.0
  • Yarn Version: -

Hi, I am creating some sort of an application skills display table where every user can set his skill-level. Use Case:
I create a new application with a post request. When the application is created, every user is added to the new application. Everytime an application is added, every existing user should get a new component with the new application and a default skill level. I got as far as creating the application and adding each user. Where I struggle is with updating each user with the component. I figured out how to “inject” it into each user with a forEach loop. But I fail with the update function of the user database. I actually called the user employees.
I tried it with a lifecyclehook afterCreate on the employees Model:

'use strict';
const { parseMultipartData, sanitizeEntity } = require('strapi-utils');

/**
 * Read the documentation (https://strapi.io/documentation/developer-docs/latest/development/backend-customization.html#lifecycle-hooks)
 * to customize this model
 */

module.exports = {
	/**
   * Triggered before user creation.
   */
	lifecycles : {
		async afterCreate(result, data) {
			console.log('lifecycle data ', data);
			console.log('lifecycle result ', result);
			const allEmployees = await strapi.query('employees').find();

			// update new app with all existing employees
			allEmployees.forEach(employee => {
				employee.applications_skilllevels.push({
					application : result.id,
					skill_level : 5
				});
			});
			try {
				allEmployees.forEach(async employee => {
					await strapi.services.employees.update({ id: employee.id }, allEmployees);
				});
			} catch (error) {
				console.log('error', error);
			}
			return sanitizeEntity(allEmployees, { model: strapi.models.employees });
		}
	}
};

I hope my explanation is clear.
Any Ideas where I go wrong?