Merge branch 'backendsecfitsmells' into 'dev'

fix userview import

See merge request !30

backend/secfit/users/views.py

 import django
-from rest_framework import mixins, generics
+from rest_framework import mixins, generics, permissions
 from workouts.mixins import CreateListModelMixin
-from rest_framework import permissions
 from users.serializers import (
     UserSerializer,
     OfferSerializer,