Feature Request: Upgrade support to SMS POH API v3

[phone-myat-kyaw]

The SMS POH service has upgraded their API to v3, but this package currently seems to rely on the v2 API endpoints (e.g., https://smspoh.com/api/v2/send).

The v2 API and v3 API have different base URLs and authentication methods, so the current package configuration may not work for users migrating to v3.

I would like to request an update to the package to support the SMS POH API v3.

According to the v3 documentation:

• New Base URL: https://v3.smspoh.com/api/rest

• New Authentication: Uses Bearer Token (Base64 encoded APIKey:APISecret) or Basic Auth, whereas v2 used a simple token.

• SMS POH v3 API Documentation

• v3 RESTful API Spec

Thank you!