Permission.RequestUserPermission(Permission.Camera) not working on Android

II use the script below to ask for permission to get access to the camera on Android. But i does nothing when i deploy it to my S8. Do i need to add something else or what do i do wrong?

 void Start()
 {
     if (Permission.HasUserAuthorizedPermission(Permission.Camera))
     {
         // The user authorized use of the microphone.
         Debug.Log("The user has already permissions");
     }
     else
     {
         // We do not have permission to use the microphone.
         // Ask for permission or proceed without the functionality enabled.
         Debug.Log("Requesting permissions");
         Permission.RequestUserPermission(Permission.Camera);

     }
 }