Getui Push SDK Error 5000: HTTP Error - API Authentication Failed

The server encountered an error while processing the request. The error code is 5000. This typically indicates a problem with API authentication. Check the following:

1. Verify the API Key: Ensure the 'appkey' in your request matches the correct API key associated with your Getui Push account.
2. Check the Sign: The 'sign' parameter should be generated correctly based on the API key, timestamp, and other request parameters. Verify the implementation of the sign generation logic.
3. Timestamp Validity: Ensure the 'timestamp' parameter is within the acceptable time window for the API request. If it's too old, the server may reject the request.
4. API Limits: Check if you are exceeding any API limits (requests per second, request volume, etc.).

If you've verified these points and still experience the error, consider contacting Getui support for further assistance.