GoCoinAPI.Client.get_token_from_request C# (CSharp) Method

    public bool get_token_from_request() {  
        string authcode = HttpContext.Current.Request.QueryString["code"];
        if (authcode != null)
        {
            auth_code = authcode;
            AuthorizationCode code = new AuthorizationCode();
            code.client_id = this.client_id;
            code.client_secret = this.client_secret;
            code.code = this.auth_code;
            code.grant_type = "authorization_code";
            code.redirect_uri = this.redirect_uri;
            auth_result = new AccessToken();
            this._auth = new Auth(this);
            auth_result = _auth.authenticate(code);
            this.setToken(auth_result);
            return true;
        }
        else
        {
            return false;
        }
    }