public async Task <string> FetchToken()
{
var now = DateTime.UtcNow;
if (_token == null || _tokenExpiry == null || _tokenExpiry < now)
{
_token = await _fetcher.FetchToken().ConfigureAwait(false);
_tokenExpiry = ParseExpiry(_token);
}
if (_token == null)
{
throw new CredentialsException("Could not refresh token");
}
return(_token);
}
private async Task <Metadata> GetMetadataAsync(bool includeToken)
{
var metadata = new Metadata();
metadata.Add("sdk_language", "csharp");
metadata.Add("sdk_version", _version);
if (!includeToken || this._auth == null)
{
return(metadata);
}
var token = await _auth.FetchToken().ConfigureAwait(false);
metadata.Add("authorization", $"Bearer {token}");
return(metadata);
}