Configure RestSharp client with correct serialization

The default deserializer does not work for some cases, so it is better to use the one that ships with .NET core

string baseUri = _configuration["ApiUrl"];

RestClientOptions restClientOptions = new()
{
   BaseUrl = new Uri(baseUri),
   RemoteCertificateValidationCallback = (_, _, _, _) => true,
   ThrowOnDeserializationError = true
};

_restClient = new(restClientOptions);
_restClient.UseSystemTextJson(new JsonSerializerOptions()
{
   PropertyNameCaseInsensitive = true,
});