The default sms send provider is just provided as an example. It doesnt need any environment parameters as it is just writing to screen
The Helsingborgs stad sms content provider is sending the message through a proxy API.
To enable it, our environment should contain:
SMS_PROVIDER=helsingborg
SMS_PROXY_URL=<The fully qualified URL of the SMS proxy service>
SMS_PROXY_KEY=<The API key to use for the SMS proxy service>