Web-to-App call (Sinch)

I have IOS/android (Sinch apps) to make audio conference call in the groups. Each group have different API and different groupID/Name, for example: GroupName: "ENGLISH4" GroupID: "EN000114" ENVIRONMENT = "[login to view URL]" applicationKey: 'd7d43371-ba83-4742-b226-38c7e9cab583' applicationSecret: 'NwXfZaWsyUmKroZKOKdAKA==' I want to make a Web-to-App call to get calls on the groups from the web, (make call with input groupdID from a webpage). ***(Demo is required).