private OAuthToken GetRefreshedAuthorizeCredential() { StringBuilder auth = new StringBuilder(); auth.Append(string.Format("{0}{1}", Address, "/oauth/AccessToken")); auth.Append(string.Format("?client_id={0}", this.ClientId)); auth.Append(string.Format("&client_secret={0}", this.ClientSecret)); auth.Append("&grant_type=client_credentials"); auth.Append("&scope=SMS"); return(OAuthToken.ParseJSON(this.DoPost("oauth/token", auth))); }