Point hmac to the correct value

[mitt3n]

Summary

The hmac value was pointed at an incorrect location. This points it at the correct spot in the response data.

Checklist

• If code changes were made then they have been tested.
  • I have updated the documentation to reflect the changes.
• This PR fixes an issue.
• This PR adds something new (e.g. new method or parameters).
• This PR is a breaking change (e.g. methods or parameters removed/renamed)
• This PR is not a code change (e.g. documentation, README, ...)

[Gobot1234]

Thank you! :)