SSL Pinning - Always failing

[nilecoder]

What's the problem?

Trying to load a self signed certificate like so:

    if let certPath = Bundle.module.url(forResource: "theCert", withExtension: "cer") {
            let certData = try! Data(contentsOf: certPath)
            let cert = SSLCert(data: certData)
            task.security = HTTPSecurity(certs: [cert], usePublicKeys: false)
}

 task.run { (response) in
            if let err = response.error {
                print("error: \(err)")
                return
            }

       // Do work
}

I have also tried using the SecKey initializer and even though I get back a valid value, pinning always fails. The task is canceled and I'm not sure why.

Can you lead me in the right direction?
Thank you for your time.