protected override async Task <HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
{
if (_authenticationResponse == null || _authenticationResponse.IsExpired())
{
_authenticationResponse = await _getToken().ConfigureAwait(false);
}
request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", $"{_authenticationResponse.AccesToken}");
return(await base.SendAsync(request, cancellationToken).ConfigureAwait(false));
}