MainActivity.kt

override fun onStart() {
        super.onStart()
        Dexter.withContext(this)
            .withPermissions(
                Manifest.permission.ACCESS_COARSE_LOCATION,
                Manifest.permission.ACCESS_FINE_LOCATION
            )
            .withListener(object : MultiplePermissionsListener {
                override fun onPermissionsChecked(report: MultiplePermissionsReport) {
                    ChatServer.startServer(application, activity = this@MainActivity)
                    viewModel.startScan()
                }

                override fun onPermissionRationaleShouldBeShown(
                    permissions: List<PermissionRequest?>?,
                    token: PermissionToken?
                ) {

                }
            })
            .check()
    }