/// <summary>
/// Requests access token for current region from token api.
/// </summary>
/// <param name="region"></param>
/// <returns></returns>
private async Task <Token> RequestTokenAsync(RegionEnum region)
{
// Request new token if token is not cached
var token = await _cache.GetOrAddAsync($"token-{region.ToQueryString()}", async q =>
{
// Build token request parameters
var content = new FormUrlEncodedContent(new List <KeyValuePair <string, string> > {
new KeyValuePair <string, string>("grant_type", "client_credentials")
});
// Setup client credentials authorization
_tokenClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic",
Convert.ToBase64String(Encoding.ASCII.GetBytes($"{_defaultApiConfiguration.ClientId}:{_defaultApiConfiguration.ClientSecret}"))
);
using var response = await _tokenClient.PostAsync(_defaultApiConfiguration.GetTokenApiUrl(region), content);
response.EnsureSuccessStatusCode();
var tokenJson = await response.Content.ReadAsStringAsync();
var tokenObject = JsonConvert.DeserializeObject <Token>(tokenJson);
q.SetAbsoluteExpiration(TimeSpan.FromSeconds(tokenObject.Expiration));
return(tokenObject);
});
return(token);
}