Bug: What is the appropriate way to create a PrivateKey?

[alexrisch]

Describe the bug

I am attempting to use PrivateKey.sign(data)
Implementing like this:
let privateKey = try PrivateKey(xmtpClient.keys.identityKey)
However when this is done the privateKey's address does not match the client's address

Is there a correct one to handle this? Or should there be different values used to ultimately create a signature?

Expected behavior

No response

Steps to reproduce the bug

No response