User.js

// models/User.js
class User extends Base {
  // Expected schema of the User record
  get schema() {
    return {
      id: Joi.string(),
      createdAt: Joi.string().isoDate(),
      displayName: Joi.string().allow('').allow(null).default(''),
      email: Joi.string().email({ minDomainSegments: 2 }).default(''),
      isAdmin: Joi.bool().default(false),
      ...
    };
  }

  // Collection name found in firestore
  static collectionName() { return 'users'; }

  // Saves new user to Firestore with the same ID used with Firebase auth
  async create() {
    if (!this.id) {
      throw new Error('Users must have an id assigned by firebase');
    }
    const fields = this.fields;
    return firestore.collection(this.collectionName).doc(this.id).set(fields);
  }

  static async register(userParams) {
    ...
  }

  static async deleteUserById(id) {
    ...
  }

  ...
};