Rewrite sqlachemy code for 1.4 to 2.x migration

ki/routes.py

@@ -10,7 +10,7 @@ from ki.auth import auth
 from ki.handlers import find_profiles as find_profiles_handler
 from ki.handlers import update_profile as update_profile_handler
 from ki.models import ContactType, Language, Skill, Token, User
-from app import app
+from app import app, db
 
 content_type_svg = "image/svg+xml"
 content_type_png = "image/png"
@@ -66,7 +66,7 @@ def handle_completion_request(model, key):
 
 
 def handle_icon_request(model, id, path):
-    object = model.query.get(id)
+    object = db.session.get(model, id)
 
     if object is None:
         return make_response({}, 404)