fix: minor backend changes

server/app/apis/auth.py

 import app.core.controller as dbc
-import app.core.utils.http_codes as codes
+import app.core.http_codes as codes
 from app.apis import admin_required
 from app.core.dto import AuthDTO
 from app.core.models import User
 from app.core.parsers import create_user_parser, login_parser
-from flask_jwt_extended import (
-    create_access_token,
-    create_refresh_token,
-    get_jwt_identity,
-    get_raw_jwt,
-    jwt_refresh_token_required,
-    jwt_required,
-)
+from flask_jwt_extended import (create_access_token, create_refresh_token,
+                                get_jwt_identity, get_raw_jwt,
+                                jwt_refresh_token_required, jwt_required)
 from flask_restx import Namespace, Resource, cors
 
 api = AuthDTO.api

server/app/apis/competitions.py

 import app.core.controller as dbc
-import app.core.utils.http_codes as codes
+import app.core.http_codes as codes
 from app.apis import admin_required
 from app.core.dto import CompetitionDTO
 from app.core.models import Competition, Slide, Team

server/app/apis/slides.py

 import app.core.controller as dbc
-import app.core.utils.http_codes as codes
+import app.core.http_codes as codes
 from app.apis import admin_required
 from app.core.dto import SlideDTO
 from app.core.models import Competition, Slide

server/app/apis/teams.py

 import app.core.controller as dbc
-import app.core.utils.http_codes as codes
+import app.core.http_codes as codes
 from app.apis import admin_required
 from app.core.dto import TeamDTO
 from app.core.models import Competition, Team

server/app/apis/users.py

 import app.core.controller as dbc
-import app.core.utils.http_codes as codes
+import app.core.http_codes as codes
 from app.apis import admin_required
 from app.core.dto import UserDTO
 from app.core.models import User

server/tests/test_app.py

-import json
-
-from app.core.utils.test_helpers import add_default_values, delete, get, post, put
-
 from tests import app, client, db
+from tests.test_helpers import add_default_values, delete, get, post, put
 
 
 def test_competition(client):

server/tests/test_db.py

 from app.core.models import City, Competition, Media, MediaType, Question, QuestionType, Role, Slide, Style, Team, User
-from app.core.utils.test_helpers import add_default_values, assert_exists, assert_insert_fail
 
 from tests import app, client, db
-
-# server/env/Scripts/pytest.exe --cov app server/tests/
+from tests.test_helpers import add_default_values, assert_exists, assert_insert_fail
 
 
 def test_user(client):

server/app/core/utils/test_helpers.py → server/tests/test_helpers.py

 import json
 
 import app.core.controller as dbc
-import pytest
 from app.core import db
 from app.core.models import City, MediaType, QuestionType, Role, Style, User