The given header was not found - fix

[Alikberova]

Change GetValues to TryGetValues in TextToSpeechEndpoint

The given header was not found
at System.Net.Http.Headers.HttpHeaders.GetValues(HeaderDescriptor descriptor)
at ElevenLabs.TextToSpeech.TextToSpeechEndpoint.<TextToSpeechAsync>d__7.MoveNext()

[StephenHodgson]

@Alikberova what exactly is this trying to fix? We need this header since it gives us metadata about the history item id

[Alikberova]

@Alikberova what exactly is this trying to fix? We need this header since it gives us metadata about the history item id

the exception was The given header was not found coming from HttpHeaders.GetValues method.
This method throws error if the HistoryItemId header is missing.

Seems this behavior is not expected in the code flow giving that code is checking for IsNullOrWhiteSpace.
If the clipId is null, this if statement never be reached as GetValues throws exception.

var clipId = response.Headers.GetValues(HistoryItemId).FirstOrDefault();

if (string.IsNullOrWhiteSpace(clipId))
{
    throw new ArgumentException("Failed to parse clip id!");
}

---

The fix ensures that, when the header is missing, the code throws the intended error message Failed to parse clip id! instead of the generic HttpHeaders exception.