public static RSAParameters GetKey(string key)
        {
            byte[]             jsonPublicKeyBytes = Convert.FromBase64String(key);
            string             jsonPublicKey      = _encoder.GetString(jsonPublicKeyBytes);
            RSAParametersModel rsaParametersModel = JsonConvert.DeserializeObject <RSAParametersModel>(jsonPublicKey);

            return(rsaParametersModel.ToRSAParameters());
        }