message: billing rule should be simple
diff: @@ -748,36 +748,13 @@ export default class StripeBillingIntegration extends BillingIntegration {
  }
  }
  - private async isTransactionUserInternal(transaction: Transaction): Promise<boolean> {
  - return await this.isUserInternal(transaction?.user);
  + private isTransactionUserInternal(transaction: Transaction): boolean {
  + return this.isUserInternal(transaction?.user);
  }
  - private async isUserInternal(user: User): Promise<boolean> {
  - // Get billable flag from Mongo
  - const u = await UserStorage.getUser(this.tenant, user.id, { }, ['billable']);
  - if (Utils.isBoolean(u.billable)) {
  + private isUserInternal(user: User): boolean {
  return !user.billable;
  }
  - if (!u.billable) {
  - return true; // Do not bill users without the billing flag.
  - }
  - // slf
  - if (this.tenant.id === '5be7fb271014d90008992f06') {
  - const email = user?.email?.toLocaleLowerCase();
  - if (email?.endsWith('@sap.com') || email?.endsWith('@vinci-facilities.com')) {
  - // Internal user
  - return true;
  - }
  - } else if (this.tenant.id === '5e2701b248aaa90007904cca') {
  - // Special mode for a particular user on that particular tenant
  - if (user?.id !== '5e74e254a25a3e0006fa79d3') {
  - // Do not bill other users than that one!
  - return true;
  - }
  - }
  - // This is an external user
  - return false;
  - }
  public async startTransaction(transaction: Transaction): Promise<BillingDataTransactionStart> {
  @@ -788,7 +765,7 @@ export default class StripeBillingIntegration extends BillingIntegration {
  };
  }
  // Temporary solution - Check for internal users
  - if (await this.isTransactionUserInternal(transaction)) {
  + if (this.isTransactionUserInternal(transaction)) {
  return {
  // Do not bill internal users
  withBillingActive: false
  