Use pathlib where possible

app/users/cli.py

@@ -1,6 +1,4 @@
 from app.models import User
-import os
-import shutil
 from app import db
 from . import bp
 

app/users/routes.py

@@ -7,7 +7,6 @@ from flask import (
 )
 from flask_breadcrumbs import register_breadcrumb
 from flask_login import current_user
-import os
 from app.models import User
 from . import bp
 from .utils import user_dynamic_list_constructor as user_dlc
@@ -40,8 +39,8 @@ def user_avatar(user_id):
     if user.avatar is None:
         return redirect(url_for('static', filename='images/user_avatar.png'))
     return send_from_directory(
-        os.path.dirname(user.avatar.path),
-        os.path.basename(user.avatar.path),
+        user.avatar.path.parent,
+        user.avatar.path.name,
         as_attachment=True,
         attachment_filename=user.avatar.filename,
         mimetype=user.avatar.mimetype