update register call with new input arg

btpytools/brainreg_bt.py

@@ -74,13 +74,15 @@ def main():
     # Run the registration using brainreg
     args, additional_images_downsample = cli.prep_registration(args)
 
+    # This is the registration function from brainreg
     register(
         atlas_name,
         args.orientation,
         vol_to_register,
         args.brainreg_directory,
         args.voxel_sizes,
         arg_groups["NiftyReg registration backend options"],
+        arg_groups["Pre-processing options"],
         sort_input_file=args.sort_input_file,
         n_free_cpus=args.n_free_cpus,
         additional_images_downsample=additional_images_downsample,