public static IEnumerator GetToken(Action <string> callback)
{
if (expires > DateTime.Now)
{
callback(token);
yield break;
}
string jwt = Jwt.GetJwt(Constants.Email, Constants.Keyfile, Constants.Scope);
WWWForm form = new WWWForm();
form.AddField("grant_type", Constants.Grant);
form.AddField("assertion", jwt);
UnityWebRequest request = UnityWebRequest.Post(Constants.Url, form);
yield return(request.SendWebRequest());
if (request.isNetworkError || request.isHttpError)
{
Debug.LogWarning(request.error);
callback(null);
yield break;
}
byte[] rawResponse = request.downloadHandler.data;
string jsonResponse = Encoding.UTF8.GetString(rawResponse);
AuthResponseBody response = Json.FromJson <AuthResponseBody>(jsonResponse);
expires = DateTime.Now.AddSeconds(response.expiresIn);
token = response.accessToken;
callback(response.accessToken);
}
