diff --git a/backend/app/core/__init__.py b/backend/app/core/__init__.py
deleted file mode 100644
index e69de29..0000000
diff --git a/backend/app/core/config.py b/backend/app/core/config.py
deleted file mode 100644
index e3ed20f..0000000
--- a/backend/app/core/config.py
+++ /dev/null
@@ -1,10 +0,0 @@
-from pydantic_settings import BaseSettings
-
-class Settings(BaseSettings):
-    API_V1_STR: str = "/api/v1"
-    PROJECT_NAME: str = "House Price Predictor"
-    
-    class Config:
-        case_sensitive = True
-
-settings = Settings() 
\ No newline at end of file
diff --git a/backend/app/errors/base_error.py b/backend/app/errors/base_error.py
new file mode 100644
index 0000000..e633d1a
--- /dev/null
+++ b/backend/app/errors/base_error.py
@@ -0,0 +1,9 @@
+from fastapi import HTTPException, status
+
+
+class BaseError(HTTPException):
+    status_code: int = status.HTTP_500_INTERNAL_SERVER_ERROR
+
+    def __init__(self, detail: str):
+        self.detail = detail
+        super().__init__(status_code=self.status_code, detail=self.detail)
\ No newline at end of file
diff --git a/backend/app/errors/not_authenticated.py b/backend/app/errors/not_authenticated.py
new file mode 100644
index 0000000..b5701ac
--- /dev/null
+++ b/backend/app/errors/not_authenticated.py
@@ -0,0 +1,10 @@
+from fastapi import status
+
+from .base_error import BaseError
+
+
+class NotAuthenticatedError(BaseError):
+    status_code: int = status.HTTP_401_UNAUTHORIZED
+
+    def __init__(self):
+        super().__init__("Not authenticated")
\ No newline at end of file
diff --git a/backend/app/providers/auth_provider.py b/backend/app/providers/auth_provider.py
new file mode 100644
index 0000000..34ce622
--- /dev/null
+++ b/backend/app/providers/auth_provider.py
@@ -0,0 +1,38 @@
+from ..errors.not_authenticated import NotAuthenticatedError
+from ..models.user import User
+from ..settings import get_settings
+
+
+class AuthProvider:
+    """
+    Provides authentication methods for the API.
+    """
+
+    def __init__(
+        self,
+    ) -> None:
+        if not get_settings().environment == "development":
+            raise NotImplementedError("AuthProvider is only implemented for development environment.")
+        
+        self._authenticated_user = self._get_mocked_user()
+
+
+    def _get_mocked_user(self):
+        return User(
+            email="test@test.com",
+            username="test",
+            password_hash="test",
+        )
+
+    @property
+    def is_authenticated(self) -> bool:
+        return self._authenticated_user is not None
+
+    @property
+    def user(self) -> User:
+        """
+        Returns the authenticated user.
+        """
+        if not self._authenticated_user:
+            raise NotAuthenticatedError()
+        return self._authenticated_user
diff --git a/backend/app/routers/houses.py b/backend/app/routers/houses.py
index 32d1f49..cd40957 100644
--- a/backend/app/routers/houses.py
+++ b/backend/app/routers/houses.py
@@ -1,11 +1,13 @@
-from fastapi import APIRouter
+from fastapi import APIRouter, Depends
+from typing import Annotated
+from ..providers.auth_provider import AuthProvider
 
 router = APIRouter()
 
 @router.post("")
-async def create_house():
-    raise NotImplementedError("This endpoint is not implemented yet.")
+async def create_house(auth_provider: Annotated[AuthProvider, Depends()]):
+    return auth_provider.user
 
-@router.get("/all")
+@router.get("")
 async def get_all_houses():
     raise NotImplementedError("This endpoint is not implemented yet.")
\ No newline at end of file
diff --git a/backend/app/settings.py b/backend/app/settings.py
index b959546..1426540 100644
--- a/backend/app/settings.py
+++ b/backend/app/settings.py
@@ -10,11 +10,10 @@ import os
 load_dotenv()
 
 class _BaseConfig(BaseSettings):
-    pass
-
-class _AppSettings(_BaseConfig):
     environment: str = Field(default=os.getenv("ENVIRONMENT", "development"))
-
+    
+class _AppSettings(_BaseConfig):
+    pass
 
 class _DbSettings(_BaseConfig):
     username: str = Field(default=os.getenv("PG_USER"))