Common Issues
Verify your API key is correctly formatted as a GUID
Ensure the Authorization header is properly set
Check that your API key is active and not expired
Monitor your request frequency
Implement proper retry logic
Consider caching data to reduce API calls
Verify the client GUID is correct
Ensure the client belongs to your account
Check that the GUID is properly formatted
Ensure required fields (e.g. firstname, lastname) are provided
Check that field values are not empty when required
Verify JSON format is valid
