diff --git a/backend/apps/authentication/__init__.py b/backend/apps/authentication/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/backend/apps/authentication/admin.py b/backend/apps/authentication/admin.py
new file mode 100644
index 0000000..8c38f3f
--- /dev/null
+++ b/backend/apps/authentication/admin.py
@@ -0,0 +1,3 @@
+from django.contrib import admin
+
+# Register your models here.
diff --git a/backend/apps/authentication/apps.py b/backend/apps/authentication/apps.py
new file mode 100644
index 0000000..d87fe5a
--- /dev/null
+++ b/backend/apps/authentication/apps.py
@@ -0,0 +1,5 @@
+from django.apps import AppConfig
+
+
+class AuthenticationConfig(AppConfig):
+    name = 'apps.authentication'
diff --git a/backend/apps/authentication/migrations/__init__.py b/backend/apps/authentication/migrations/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/backend/apps/authentication/models.py b/backend/apps/authentication/models.py
new file mode 100644
index 0000000..71a8362
--- /dev/null
+++ b/backend/apps/authentication/models.py
@@ -0,0 +1,3 @@
+from django.db import models
+
+# Create your models here.
diff --git a/backend/apps/authentication/tests.py b/backend/apps/authentication/tests.py
new file mode 100644
index 0000000..7ce503c
--- /dev/null
+++ b/backend/apps/authentication/tests.py
@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.
diff --git a/backend/apps/authentication/urls.py b/backend/apps/authentication/urls.py
new file mode 100644
index 0000000..532b54c
--- /dev/null
+++ b/backend/apps/authentication/urls.py
@@ -0,0 +1,14 @@
+from django.urls import include, path
+from rest_framework_simplejwt.views import (
+    TokenObtainPairView,
+    TokenRefreshView,
+    TokenVerifyView
+)
+
+urlpatterns = [
+    path('login/', TokenObtainPairView.as_view(), name='token_obtain_pair'),
+    #path('signup/', ),
+
+    path('refresh/', TokenRefreshView.as_view(), name='token_refresh'),
+    path('verify/', TokenVerifyView.as_view(), name='token_verify'),
+]
\ No newline at end of file
diff --git a/backend/apps/authentication/views.py b/backend/apps/authentication/views.py
new file mode 100644
index 0000000..91ea44a
--- /dev/null
+++ b/backend/apps/authentication/views.py
@@ -0,0 +1,3 @@
+from django.shortcuts import render
+
+# Create your views here.
diff --git a/backend/apps/shelves/serializers.py b/backend/apps/shelves/serializers.py
index 1ee777e..75be0ce 100644
--- a/backend/apps/shelves/serializers.py
+++ b/backend/apps/shelves/serializers.py
@@ -5,14 +5,14 @@ from apps.user.serializers import UserSerializer
 from apps.user.models import User
 
 class ShelfSerializer(serializers.ModelSerializer):
-    user = UserSerializer(read_only=True)    
-
     class Meta:
         model = Shelf
-        fields = ["id", "name", "user"]
+        fields = ["id", "name"]
         read_only_fields = ["id"]
 
+
     def create(self, validated_data):
-        # Pobieramy user_id z tokena
+        request = self.context["request"]
+        validated_data["user"] = request.user
 
         return super().create(validated_data)
\ No newline at end of file
diff --git a/backend/apps/shelves/views.py b/backend/apps/shelves/views.py
index 8c61f4c..4efacc5 100644
--- a/backend/apps/shelves/views.py
+++ b/backend/apps/shelves/views.py
@@ -3,7 +3,17 @@ from django.shortcuts import render
 from apps.shelves.models import Shelf
 from apps.shelves.serializers import ShelfSerializer
 from rest_framework import viewsets 
+from rest_framework.permissions import IsAuthenticated
+from rest_framework_simplejwt.authentication import JWTAuthentication
 
 class ShelvesViewSet(viewsets.ModelViewSet):
     queryset = Shelf.objects.select_related("user")
-    serializer_class = ShelfSerializer
\ No newline at end of file
+    serializer_class = ShelfSerializer
+
+    authentication_classes = [JWTAuthentication]
+    permission_classes = [IsAuthenticated]
+
+    def get_queryset(self):
+        return Shelf.objects.filter(user_id=self.request.user.pk)
+    
+
diff --git a/backend/apps/urls.py b/backend/apps/urls.py
index 40fbfd4..90cce89 100644
--- a/backend/apps/urls.py
+++ b/backend/apps/urls.py
@@ -1,5 +1,11 @@
+from drf_spectacular.views import SpectacularAPIView, SpectacularSwaggerView
 from django.urls import include, path
 
 urlpatterns = [
-    path("shelves", include("apps.shelves.urls"))
+    path("auth", include("apps.authentication.urls")),
+    path("shelves", include("apps.shelves.urls")),
+
+    path('schema/', SpectacularAPIView.as_view(), name='schema'),
+    path('swagger/', SpectacularSwaggerView.as_view(url_name='schema'), name='swagger-ui'),
+
 ]
diff --git a/backend/apps/user/admin.py b/backend/apps/user/admin.py
index 8c38f3f..95879ad 100644
--- a/backend/apps/user/admin.py
+++ b/backend/apps/user/admin.py
@@ -1,3 +1,7 @@
 from django.contrib import admin
+from apps.user.models import User
 
-# Register your models here.
+class UserAdmin(admin.ModelAdmin):
+    pass
+
+admin.site.register(User, UserAdmin)
\ No newline at end of file
diff --git a/backend/config/django/base.py b/backend/config/django/base.py
index 3729f0f..557d2a9 100644
--- a/backend/config/django/base.py
+++ b/backend/config/django/base.py
@@ -16,6 +16,7 @@ ALLOWED_HOSTS = ["*"]
 # Application definition
 
 INSTALLED_APPS = [
+    "apps.authentication.apps.AuthenticationConfig",
     "apps.user.apps.UserConfig",
     "apps.shelves.apps.ShelvesConfig",
     "django.contrib.admin",
@@ -26,6 +27,8 @@ INSTALLED_APPS = [
     "django.contrib.staticfiles",
     "rest_framework",
     "django_filters",
+    "rest_framework_simplejwt",
+    "drf_spectacular",
 ]
 
 MIDDLEWARE = [
@@ -89,6 +92,26 @@ AUTH_PASSWORD_VALIDATORS = [
 
 AUTH_USER_MODEL = "user.User"
 
+REST_FRAMEWORK = {
+    'DEFAULT_RENDERER_CLASSES': [
+        'rest_framework.renderers.JSONRenderer',
+    ],
+    'DEFAULT_PARSER_CLASSES': [
+        'rest_framework.parsers.JSONParser',
+    ],
+    'DEFAULT_AUTHENTICATION_CLASSES': [
+        'rest_framework_simplejwt.authentication.JWTAuthentication',
+    ],
+    'DEFAULT_SCHEMA_CLASS': 'drf_spectacular.openapi.AutoSchema',
+}
+
+SPECTACULAR_SETTINGS = {
+    'TITLE': 'Library API',
+    'DESCRIPTION': 'Library project',
+    'VERSION': '1.0.0',
+    'SERVE_INCLUDE_SCHEMA': False,
+}
+
 
 # Internationalization
 # https://docs.djangoproject.com/en/6.0/topics/i18n/
diff --git a/backend/requirements.txt b/backend/requirements.txt
index b08c5cb..0a70b1f 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -2,4 +2,6 @@ django==6.0.3
 django-environ==0.13.0
 djangorestframework==3.16.1
 django-filter==25.2
+djangorestframework-simplejwt==5.5.1
+drf-spectacular==0.29.0
 pillow==12.1.1
\ No newline at end of file