diff --git a/auth/models.py b/auth/models.py
index 1608fee..8a86691 100644
--- a/auth/models.py
+++ b/auth/models.py
@@ -1,26 +1,27 @@
 from enum import Enum
 from backend.config import SECRET_KEY, ALGORITHM, ACCESS_TOKEN_EXPIRE_MINUTES
-from backend.config import pwd_context
+from backend.config import pwd_context, get_session_db
 from datetime import datetime, timedelta, timezone
 from pydantic import BaseModel
 from fastapi import Depends, HTTPException
-from typing import Annotated
+from typing import Annotated, Optional
 from fastapi.security import OAuth2PasswordBearer
 import jwt
+from sqlmodel import SQLModel, Field, Session, select
+from pydantic.networks import EmailStr
 
+### TOKEN MODELLERİ ###
 class Token(BaseModel):
-    access_token : str
-    token_type : str
+    access_token: str
+    token_type: str
 
 class TokenData(BaseModel):
-    username : str | None = None
-    role : str | None = None
-    status : str | None = None
+    username: Optional[str] = None
+    role: Optional[str] = None
+    status: Optional[str] = None
 
 
-oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/auth/login")
-
-#### ENUMS ####
+### ENUMS ###
 class Role(str, Enum):
     user = "user"
     admin = "admin"
@@ -32,46 +33,38 @@ class Status(str, Enum):
     banned = "banned"
     suspended = "suspended"
 
-class User(BaseModel):
-    username : str | None = None
-    user_id : int | None = None
-    role : Role | None = None
-    status : Status | None = None
+### KULLANICI MODELLERİ ###
+class UserBase(SQLModel):
+    username: Optional[str] = None
+    user_id: Optional[int] = None
+    role: Optional[Role] = None
+    status: Optional[Status] = None
+
+class UserInDb(UserBase):
+    hashed_password: str | None = None
+
+class UserPublic(UserBase):
+    pass
+
+class UserCreate(BaseModel):
+    username: Optional[str] = None
+    role: Optional[Role] = None
+    email : EmailStr | None = None
+    status: Optional[Status] = None
+    password : str  | None = None
+
+### VERİTABANI MODELİ ###
+class DBUser(SQLModel, table=True):
+    __tablename__ = "users"  # opsiyonel, sqlmodel bunu otomatik de atar
+    user_id: Optional[int] = Field(default=None, primary_key=True)
+    username: str = Field(index=True, nullable=False)
+    hashed_password: str = Field(nullable=False)
+    role: Role = Field(default=Role.user)
+    status: Status = Field(default=Status.active)
 
 
-class UserInDb(User):
-    hashed_password : str | None = None
-
-class UserPublic(BaseModel):
-    username : str | None = None
-    role : Role | None = None
-    status : Status | None = None
-    user_id : int | None = None
-
-
-fake_db = {
-    "bedir": {
-        "username": "bedir",
-        "user_id": 1,
-        "hashed_password": "$2a$12$mYGWGo9c3Di3SJyYjYf3XOAsu5nP8jekf3KTItO9pbUBEm5BcapRO",  # Bcrypt örneği
-        "role": Role.user,
-        "status": Status.active,
-    },
-    "alice": {
-        "username": "alice",
-        "user_id": 2,
-        "hashed_password": "$2b$12$Alic3FakeHashedPasSw0rdxxxxxxxyyyyyyzzzzzz",
-        "role": Role.user,
-        "status": Status.suspended,
-    },
-    "adminuser": {
-        "username": "adminuser",
-        "user_id": 3,
-        "hashed_password": "$2b$12$AdminFakeHashedPasSw0rdxxxxxxxyyyyyyzzzzzz",
-        "role": Role.admin,
-        "status": Status.active,
-    }
-}
+### AUTH ###
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/auth/login")
 
 
 def verify_password(plain_password: str, hashed_password: str) -> bool:
@@ -80,18 +73,22 @@ def verify_password(plain_password: str, hashed_password: str) -> bool:
 def get_password_hash(password: str) -> str:
     return pwd_context.hash(password)
 
-def authenticate_user(fake_db, username: str, password: str) -> UserInDb | bool:
-    user = fake_db.get(username)
-    if not user:
-        return False
-    if not verify_password(password, user["hashed_password"]):
-        return False
-    
-    return user
+def authenticate_user(
+        session: Annotated[Session, Depends(get_session_db)],
+        username: str,
+        password: str
+    ) -> UserInDb | None:
+
+    statement = select(DBUser).where(DBUser.username == username)
+    result = session.exec(statement).first()
+    if not result or not verify_password(password, result.hashed_password):
+        return None
+    return result
+
 
 def create_access_token(
-        data : dict,
-        expires_delta : Annotated[timedelta, None] = timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES),
+        data: dict,
+        expires_delta: Optional[timedelta] = timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES),
 ) -> str:
     to_encode = data.copy()
     expire = datetime.now(timezone.utc) + expires_delta
@@ -100,79 +97,46 @@ def create_access_token(
     return encoded_jwt
 
 
-def get_user(db, username: str) -> UserInDb | None:
-    if username in db:
-        user_dict = db[username]
-        return UserInDb(**user_dict)
-    return None
+async def get_user(
+        session: Annotated[Session, Depends(get_session_db)],
+        username: str
+    ) -> UserInDb | None:
+
+    statement = select(DBUser).where(DBUser.username == username)
+    result = session.exec(statement).first()
+    return result
+
+
+async def get_current_user(
+    token: Annotated[str, Depends(oauth2_scheme)],
+    session: Annotated[Session, Depends(get_session_db)]
+) -> UserPublic:
 
-def get_current_user(token: Annotated[str, Depends(oauth2_scheme)]) -> UserPublic | None:
     credentials_exception = HTTPException(
         status_code=401,
-        detail="Burda bir hata var",
+        detail="Invalid credentials",
         headers={"WWW-Authenticate": "Bearer"},
     )
     try:
         payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
         token_data = TokenData(**payload)
-        token_data.username = payload.get("sub")
-        username : str = token_data.username
+        username: Optional[str] = payload.get("sub")
         if username is None:
             raise credentials_exception
-        
     except jwt.PyJWTError:
         raise credentials_exception
-    
-    user = get_user(fake_db, username=username)
+
+    user = await get_user(session, username)
     if user is None:
         raise credentials_exception
-    
+
     return user
 
+
 async def get_current_active_user(
-        current_user : Annotated[UserInDb, Depends(get_current_user)]
-) -> UserPublic | None:
-    
+    current_user: Annotated[UserInDb, Depends(get_current_user)]
+) -> UserPublic:
+
     if current_user.status == Status.banned:
         raise HTTPException(status_code=400, detail="Inactive user")
     return current_user
-
-"""
-class User(BaseModel):
-    username : str
-    name : str | None = None
-    surname : str | None = None
-    email : EmailStr | None = None
-    role : Role | None = None
-    status : Status | None = None
-    bio : str | None = None
-    created_date : datetime | None = None
-
-    collections : list[str] | None = None
-    items = list[str] | None = None
-
-class UserInDB(User):
-    hashed_password : str | None = None
-
-class UserSelfProfile(BaseModel):
-    username : str
-    name : str | None = None
-    surname : str | None = None
-    email : EmailStr | None = None
-    role : Role | None = None
-    status : Status | None = None
-    bio : str | None = None
-    created_date : datetime | None = None
-
-    collections : list[str] | None = None
-    items = list[str] | None = None
-
-class UserPublicProfile(BaseModel):
-    username : str
-    role : Role | None = None
-    bio : str | None = None
-    created_date : datetime | None = None
-    collections : list[str] | None = None
-    items = list[str] | None = None
-
-"""
\ No newline at end of file
diff --git a/auth/router.py b/auth/router.py
index 39110e2..2e1a25d 100644
--- a/auth/router.py
+++ b/auth/router.py
@@ -1,10 +1,15 @@
 from fastapi import APIRouter, Depends, HTTPException, status
-from .models import UserInDb, User, Role, Token, UserPublic
-from .models import get_current_active_user, authenticate_user, create_access_token , fake_db, get_current_user
+from .models import UserInDb, Role, Token, UserPublic, UserBase
+from .models import get_current_active_user, authenticate_user, create_access_token,get_current_user
 from datetime import timedelta, datetime, timezone
+from ..auth.models import get_password_hash, verify_password
 from ..config import ACCESS_TOKEN_EXPIRE_MINUTES
 from typing import Annotated, Optional
+from sqlmodel import Session
+from ..config import get_session_db
+from fastapi import Depends
 from fastapi.security import OAuth2PasswordRequestForm
+from .models import UserCreate, DBUser
 
 
 router = APIRouter(
@@ -16,7 +21,7 @@ router = APIRouter(
 
 @router.get("/me")
 async def read_users_me(
-    current_user: Annotated[User, Depends(get_current_active_user)],
+    current_user: Annotated[UserBase, Depends(get_current_active_user)],
 ) -> UserPublic:
     return current_user
 
@@ -28,15 +33,16 @@ def ADMIN(current_user: Annotated[UserInDb, Depends(get_current_user)]):
 
 
 @router.get('/home')
-async def home(current_user : Annotated[User, Depends(ADMIN)]):
+async def home(current_user : Annotated[UserBase, Depends(ADMIN)]):
     return {"message" : f"Welcome to home page {current_user.username}"}
 
 @router.post('/login')
 async def login_for_access_token(
     form_data : Annotated[OAuth2PasswordRequestForm, Depends()],
+    session : Annotated[Session, Depends(get_session_db)],
 ) -> Token:
     
-    user = authenticate_user(fake_db, form_data.username, form_data.password)
+    user = authenticate_user(session, form_data.username, form_data.password)
     if not user:
         raise HTTPException(
             status_code=status.HTTP_401_UNAUTHORIZED,
@@ -45,6 +51,26 @@ async def login_for_access_token(
         )
     access_token_expires = timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
     access_token = create_access_token(
-        data={"sub": user['username'], "role": user['role'], 'status': user['status']}, expires_delta=access_token_expires
+        data={"sub": user.username, "role": user.role, 'status': user.status}, expires_delta=access_token_expires
     )
-    return Token(access_token=access_token, token_type="bearer")
\ No newline at end of file
+    return Token(access_token=access_token, token_type="bearer")
+
+
+@router.post('/register', response_model=UserPublic)
+async def create_user(
+        session : Annotated[Session, Depends(get_session_db)],
+        user : Annotated[UserCreate, Depends()]
+):
+    user_dict = user.dict()
+    print(user.password)
+    user_dict['hashed_password'] = get_password_hash(user.password)
+    print (user_dict['hashed_password'])
+
+    if not verify_password(user.password, user_dict['hashed_password']):
+        raise HTTPException(status_code=400, detail="Password hashing failed")
+    
+    db_user = DBUser.model_validate(user_dict)
+    session.add(db_user)
+    session.commit()
+    session.refresh(db_user)
+    return db_user
\ No newline at end of file
diff --git a/config.py b/config.py
index c615c11..b2fcaf3 100644
--- a/config.py
+++ b/config.py
@@ -4,18 +4,30 @@ from sqlalchemy.orm import sessionmaker
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 from passlib.context import CryptContext
+from sqlmodel import SQLModel, Field, Session
 from dotenv import load_dotenv
 import os
 
 load_dotenv()
 
 
-Base = declarative_base() #basic class for declarative models
+# Veritabanı URL'sini oluştur
+DATABASE_URL = (
+    f"postgresql://{os.getenv('USERNAME_DB')}:"
+    f"{os.getenv('PASSWORD_DB')}@"
+    f"{os.getenv('HOST_DB')}:"
+    f"{os.getenv('PORT_DB')}/"
+    f"{os.getenv('NAME_DB')}"
+)
+
+engine = create_engine(DATABASE_URL, echo=False)
+def init_db():
+    SQLModel.metadata.create_all(engine)
+
+def get_session_db():
+    with Session(engine) as session:
+        yield session
 
-DATABASE_URL = f"postgresql://{os.getenv('USERNAME_DB')}:{os.getenv('PASSWORD_DB')}@{os.getenv('HOST_DB')}:{os.getenv('PORT_DB')}/{os.getenv('NAME_DB')}"
-engine = create_engine(DATABASE_URL)
-SessionLocal = sessionmaker(bind=engine)
-Base.metadata.create_all(bind=engine)
 
 
 ### SECRET KEY ###
@@ -34,6 +46,9 @@ origins = [
 ]
 
 app = FastAPI()
+@app.on_event("startup")
+def on_startup():
+    init_db()
 
 app.add_middleware(
     CORSMiddleware,
@@ -42,3 +57,6 @@ app.add_middleware(
     allow_methods=["*"],
     allow_headers=["*"],
 )
+
+
+
diff --git a/docker-compose.yml b/docker-compose.yml
index aa503a2..76c3981 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -9,10 +9,4 @@ services:
       POSTGRES_DB: postgres_db
 
     ports:
-      - "5434:5432"
-    volumes:
-      - postgres_data:/db
-
-volumes:
-  postgres_data:
-    driver: local
\ No newline at end of file
+      - "5434:5432"
\ No newline at end of file
diff --git a/items/models.py b/items/models.py
index c4f9981..8d7cb69 100644
--- a/items/models.py
+++ b/items/models.py
@@ -1,7 +1,7 @@
 from datetime import datetime, timedelta, timezone
-from ..auth.models import UserInDb
+from ..auth.models import UserBase
 
-class UserProfile(UserInDb):
+class UserProfile(UserBase):
     bio : str | None = None
     created_date : datetime | None = None
     collections : list[str] | None = None
diff --git a/requirements.txt b/requirements.txt
index 5a6d67c..3f98454 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,6 +30,7 @@ rich-toolkit==0.14.4
 shellingham==1.5.4
 sniffio==1.3.1
 SQLAlchemy==2.0.40
+sqlmodel==0.0.24
 starlette==0.46.2
 typer==0.15.3
 typing-inspection==0.4.0