public async Task <string> GetAccessTokenAsync()
{
if (!_authenticationResult.IsAccessTokenExpired())
{
return(_authenticationResult.AccessToken);
}
var loginSuccess = await SilentLoginAsync();
if (loginSuccess)
{
return(_authenticationResult.AccessToken);
}
else
{
// The token has expired and we can't obtain a new one
// The session will be closed.
_authenticationResult = null;
LoggedOut?.Invoke(this, EventArgs.Empty);
return(string.Empty);
}
}