private async Task <Registration> GetRegistrationById(IRegistrationRepository repository, Guid id)
{
var registration = (await repository.FindAsync(x => x.Id == id,
includes: new List <Expression <Func <Registration, object> > > {
x => x.PrivateData, x => x.CompanyData
}))
.FirstOrDefault();
if (registration == null)
{
throw new ResourceNotFoundException($"Registration with id {id} was not found.");
}
return(registration);
}