@Cowboy
I'm glad to hear that you've already checked the API documentation and verified your credentials. Since you're receiving a 400 Bad Request error, it typically indicates that there's something wrong with the request you're sending. Here are a few things you can check:
1. **Required Fields**: Ensure that all required fields are included in your request and that they are correctly formatted.
2. **Parameter Values**: Double-check the values for each parameter, especially those that require a specific format, such as phone numbers.
3. **API Endpoint**: Confirm that you're sending the request to the correct API endpoint.
4. **HTTP Method**: Make sure you're using the correct HTTP method (POST, GET, etc.) for creating phone numbers.
5. **Rate Limits**: Check if you've hit any rate limits that might prevent the creation of new phone numbers.
6. **API Changes**: Sometimes, APIs are updated, and the documentation might not reflect those changes immediately. Verify if there have been any recent changes to the API that affect phone number creation.
If everything seems correct on your end, it might be helpful to see the exact error message returned by the API. This can provide more insight into what's going wrong. If you can provide me with the error message, I might be able to offer more specific advice.
If you're unable to resolve the issue with this information, please reach out to support for more detailed assistance.