final Locale locale = command.extractLocale();
final DateTimeFormatter fmt = DateTimeFormat.forPattern(command.dateFormat()).withLocale(locale);
final LocalDate activationDate = command.localDateValueOfParameterNamed("activationDate");
final AppUser currentUser = this.context.authenticatedUser();
client.activate(currentUser, fmt, activationDate);
CommandProcessingResult result = openSavingsAccount(client, fmt);
this.clientRepository.saveAndFlush(client);
return new CommandProcessingResultBuilder() //
.withCommandId(command.commandId()) //