Queries on the ENV variables

[Sivakajan-tech]

@stephane-segning Thanks for the extension, I’m currently setting up the Keycloak Phone Number Login plugin and would like some clarification regarding the following environment variables:

-e SMS_API_URL=http://your-sms-api-url
-e SMS_API_COUNTRY_PATTERN='cm|de|fr'
-e SMS_API_AUTH_USERNAME=someuser
-e SMS_API_AUTH_PASSWORD=somepassword

Could you please clarify:

1. What kind of service is expected for SMS_API_URL? (e.g., is it a custom SMS backend implementing specific endpoints like /sms/send?)
2. Is the SMS_API_URL a mandatory env variable?
3. How can we select what type of SMS provider we are going to use?
4. Are there any reference implementations or examples available for this SMS API?
5. How are SMS_API_AUTH_USERNAME and SMS_API_AUTH_PASSWORD used (Basic Auth, etc.)?

TIA!