FBX export operator - How can I change the scaling mode? I want to change the scaling mode in blender

based on documentation I can do it:
apply_unit_scale
apply_unit_scale (boolean, (optional)) – Apply Unit, Take into account current Blender units settings (if unset, raw Blender Units values are used as-is)

apply_scale_options
apply_scale_options (enum in ['FBX_SCALE_NONE', 'FBX_SCALE_UNITS', 'FBX_SCALE_CUSTOM', 'FBX_SCALE_ALL'], (optional)) –

I tried to change the scaling mode to unit scaling in blender but I don't know why it didn't work
import bpy

bpy.ops.export_scene.fbx(apply_unit_scale=True)
bpy.ops.export_scene.fbx(apply_scale_options='FBX_SCALE_UNITS')

I have this error in the console:

I also tried to copy and paste the example in the console but I have same error!:
bpy.ops.export_scene.fbx(filepath=&quot;&quot;, check_existing=True, filter_glob=&quot;*.fbx&quot;, use_selection=False, use_active_collection=False, global_scale=1.0, apply_unit_scale=True, apply_scale_options='FBX_SCALE_NONE', bake_space_transform=False, object_types={'ARMATURE', 'CAMERA', 'EMPTY', 'LIGHT', 'MESH', 'OTHER'}, use_mesh_modifiers=True, use_mesh_modifiers_render=True, mesh_smooth_type='OFF', use_subsurf=False, use_mesh_edges=False, use_tspace=False, use_custom_props=False, add_leaf_bones=True, primary_bone_axis='Y', secondary_bone_axis='X', use_armature_deform_only=False, armature_nodetype='NULL', bake_anim=True, bake_anim_use_all_bones=True, bake_anim_use_nla_strips=True, bake_anim_use_all_actions=True, bake_anim_force_startend_keying=True, bake_anim_step=1.0, bake_anim_simplify_factor=1.0, path_mode='AUTO', embed_textures=False, batch_mode='OFF', use_batch_own_dir=True, use_metadata=True, axis_forward='-Z', axis_up='Y')
oh sorry for this stupid question
as Robert Gützkow and brockmann mentioned I didn't set the path
import bpy

#example path to store files
path = os.path.expanduser(&quot;~/Desktop&quot;)

#export fbx
filename = path + 'Test.fbx'
bpy.ops.export_scene.fbx(filepath=filename, use_selection=True,apply_scale_options='FBX_SCALE_UNITS',apply_unit_scale=True)


os.path.join() method in Python join one or more path components
intelligently. This method concatenates various path components with
exactly one directory separator (‘/’) following each non-empty part
except the last path component. If the last path component to be
joined is empty then a directory seperator (‘/’) is put at the end.

import bpy

# importing os module  
import os 
  
    
#example path to store files
path = os.path.expanduser(&quot;~/Desktop&quot;)

# Join various path components  
filename = os.path.join(path, 'Test.fbx')
    
bpy.ops.export_scene.fbx(filepath=filename, use_selection=True,apply_scale_options='FBX_SCALE_UNITS',apply_unit_scale=True)

Instead of setting path manually, I use this solution