this.context.authenticatedUser();
final LoanUpdateCommand loanUpdateCommand = this.loanUpdateCommandFromApiJsonDeserializer.commandFromApiJson(command.json());
loanUpdateCommand.validate();
final LocalDate dateOfLoanOfficerunAssigned = command.localDateValueOfParameterNamed("unassignedDate");
final Loan loan = this.loanAssembler.assembleFrom(loanId);
checkClientOrGroupActive(loan);