How can i trigger ios permission requests at beginning of app

Unity Engine
1

So basicly the app requests for two permissions, for camera and access to photo library. The camera is an AR camera, i can trigger that by having a scene with the camera in it and load it at the beginning. The photo library permission popup comes up when i save a picture. The question is how can i trigger the photo library permission without having to save an image.

Thanks in advance.

2

Fixed it:
Add the following in the main method in the main.mm file in XCode:

 PHAuthorizationStatus status = [PHPhotoLibrary authorizationStatus];
        if (status == PHAuthorizationStatusAuthorized) {
            // Access has been granted.
        }
       
        else if (status == PHAuthorizationStatusDenied) {
            // Access has been denied.
        }
       
        else if (status == PHAuthorizationStatusNotDetermined) {
           
            // Access has not been determined.
            [PHPhotoLibrary requestAuthorization:^(PHAuthorizationStatus status) {
               
                if (status == PHAuthorizationStatusAuthorized) {
                    // Access has been granted.
                }
               
                else {
                    // Access has been denied.
                }
            }];
        }
       
        else if (status == PHAuthorizationStatusRestricted) {
            // Restricted access - normally won't happen.
        }