message: Ensured only a partial representation of the BitgoToken is logged upon HMAC invalidation.
  Summary:
  Reviewers: bigly, tyler
  Subscribers: james, tyler
diff: @@ -362,12 +362,14 @@ const BitGo = function(params) {
  const receivedHmac = response.headers.hmac;
  const expectedHmac = verificationResponse.expectedHmac;
  const signatureSubject = verificationResponse.signatureSubject;
  + // Log only the first 10 characters of the token to ensure the full token isn't logged.
  + const partialBitgoToken = bitgo._token.substring(0, 10);
  const errorDetails = {
  expectedHmac,
  receivedHmac,
  hmacInput: signatureSubject,
  requestToken: req.authenticationToken,
  - bitgoToken: bitgo._token
  + bitgoToken: partialBitgoToken
  };
  debug('Invalid response HMAC: %O', errorDetails);
  const error = new Error('invalid response HMAC, possible man-in-the-middle-attack');
  