public async Task <ActionResult <string> > AddCountries([FromBody] Country country, CancellationToken cancellationToken)
{
if (country == null)
{
return(BadRequest("country is null"));
}
await countryContext.AddAsync(country);
await countryContext.SaveChangesAsync(cancellationToken).ConfigureAwait(false);
await cache.RemoveAsync("countries", cancellationToken).ConfigureAwait(false);
return(Ok("OK!"));
}