public ActionResult <int> Post(
[FromBody] CreateClientRequest clientRequest)
{
if (!ModelState.IsValid)
{
return(BadRequest());
}
var nextId = mockClients.Data.Max(c => c.Id) + 1;
var client = new Client(
id: nextId,
name: clientRequest.Name,
email: clientRequest.Email,
gender: clientRequest.Gender,
phone: clientRequest.Phone);
mockClients.Add(client);
return(CreatedAtAction(nameof(Post), new { client.Id }));
}