public async Task <IActionResult> PutPortfolio(int id, Portfolio portfolio)
        {
            if (id != portfolio.Id)
            {
                return(BadRequest());
            }

            _context.Entry(portfolio).State = EntityState.Modified;

            try
            {
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!PortfolioExists(id))
                {
                    return(NotFound());
                }
                else
                {
                    throw;
                }
            }

            return(NoContent());
        }
        public async Task <IActionResult> PutPerson(int id, Person person)
        {
            if (id != person.Id)
            {
                return(BadRequest("No ID provided for person."));
            }

            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }

            _context.Entry(person).State = EntityState.Modified;

            try
            {
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!PersonExists(id))
                {
                    return(NotFound());
                }
                else
                {
                    throw;
                }
            }

            return(NoContent());
        }