Hashing a String in a Codeless API Service

I am a codeless (non-programmer) user. I’m adding Slack chat functionality. Slack requires I verify requests from Slack to my webhook by hashing a string using a secret key, then using the “hex digest of the hash.” Verifying requests from Slack | Slack Developer Docs

Does Backendless allow for this functionality? I tried to use a custom code block with some code gemini created for me and it gave me the error: “ServerCode registration is allowed only synchronously during module load phase”

Hello @David_King

Thank you for your message!

Unfortunately, you didn’t provide enough details about the steps that led to the error, so at this point I can only make assumptions about what might be causing it.

To help you more effectively, could you please provide the steps to reproduce the issue?
Once I have that information, I’ll be happy to take a closer look and assist you further.

Regards,
Volodymyr