message: billing - prevent  start transaction if no payment method
diff: @@ -331,14 +331,20 @@ export default class OCPPUtils {
  lastUpdate: new Date()
  };
  } catch (error) {
  + const message = `Billing - startTransaction failed - transaction ID '${transaction.id}'`;
  await Logging.logError({
  tenantID: tenantID,
  user: transaction.userID,
  source: Constants.CENTRAL_SERVER,
  action: ServerAction.BILLING_TRANSACTION,
  module: MODULE_NAME, method: 'billTransaction',
  - message: `Failed to bill the Transaction ID '${transaction.id}'`,
  - detailedMessages: { error: error.message, stack: error.stack }
  + message, detailedMessages: { error: error.message, stack: error.stack }
  + });
  + throw new BackendError({
  + user: transaction.user,
  + action: ServerAction.BILLING_TRANSACTION,
  + module: MODULE_NAME, method: 'billTransaction',
  + message, detailedMessages: { error: error.message, stack: error.stack }
  });
  }
  break;
  @@ -352,14 +358,20 @@ export default class OCPPUtils {
  transaction.billingData.lastUpdate = new Date();
  }
  } catch (error) {
  + const message = `Billing - updateTransaction failed - transaction ID '${transaction.id}'`;
  await Logging.logError({
  tenantID: tenantID,
  user: transaction.userID,
  source: Constants.CENTRAL_SERVER,
  action: ServerAction.BILLING_TRANSACTION,
  module: MODULE_NAME, method: 'billTransaction',
  - message: `Failed to bill the Transaction ID '${transaction.id}'`,
  - detailedMessages: { error: error.message, stack: error.stack }
  + message, detailedMessages: { error: error.message, stack: error.stack }
  + });
  + throw new BackendError({
  + user: transaction.user,
  + action: ServerAction.BILLING_TRANSACTION,
  + module: MODULE_NAME, method: 'billTransaction',
  + message, detailedMessages: { error: error.message, stack: error.stack }
  });
  }
  break;
  @@ -374,14 +386,20 @@ export default class OCPPUtils {
  transaction.billingData.lastUpdate = new Date();
  }
  } catch (error) {
  + const message = `Billing - stopTransaction failed - transaction ID '${transaction.id}'`;
  await Logging.logError({
  tenantID: tenantID,
  user: transaction.userID,
  source: Constants.CENTRAL_SERVER,
  action: ServerAction.BILLING_TRANSACTION,
  module: MODULE_NAME, method: 'billTransaction',
  - message: `Failed to bill the Transaction ID '${transaction.id}'`,
  - detailedMessages: { error: error.message, stack: error.stack }
  + message, detailedMessages: { error: error.message, stack: error.stack }
  + });
  + throw new BackendError({
  + user: transaction.user,
  + action: ServerAction.BILLING_TRANSACTION,
  + module: MODULE_NAME, method: 'billTransaction',
  + message, detailedMessages: { error: error.message, stack: error.stack }
  });
  }
  break;
  