Fix demo login credentials and form encoding

backend/app/auth.py

@@ -5,39 +5,75 @@ from fastapi.security import OAuth2PasswordBearer
 from jose import JWTError, jwt
 from passlib.context import CryptContext
 from pydantic import BaseModel
+
 SECRET_KEY = 'change-me-in-production'
 ALGORITHM = 'HS256'
 ACCESS_TOKEN_EXPIRE_MINUTES = 120
 pwd_context = CryptContext(schemes=['bcrypt'], deprecated='auto')
 oauth2_scheme = OAuth2PasswordBearer(tokenUrl='/auth/token')
-class Token(BaseModel): access_token: str; token_type: str = 'bearer'
-class TokenData(BaseModel): username: Optional[str] = None
-class User(BaseModel): username: str; disabled: bool = False; role: str = 'viewer'
-class UserInDB(User): hashed_password: str
-fake_users_db = {'admin': {'username': 'admin', 'hashed_password': pwd_context.hash('admin123'), 'disabled': False, 'role': 'admin'}, 'viewer': {'username': 'viewer', 'hashed_password': pwd_context.hash('viewer123'), 'disabled': False, 'role': 'viewer'}}
-def verify_password(plain_password: str, hashed_password: str) -> bool: return pwd_context.verify(plain_password, hashed_password)
+
+class Token(BaseModel):
+    access_token: str
+    token_type: str = 'bearer'
+
+class TokenData(BaseModel):
+    username: Optional[str] = None
+
+class User(BaseModel):
+    username: str
+    disabled: bool = False
+    role: str = 'viewer'
+
+class UserInDB(User):
+    hashed_password: str
+
+fake_users_db = {
+    'admin': {
+        'username': 'admin',
+        'hashed_password': '$2b$12$j2rrsvzYhC9lQ4w6WJ1wPeY8CKEMMvmFo0xSg6u40qCMgfHdCqkfG',
+        'disabled': False,
+        'role': 'admin',
+    },
+    'viewer': {
+        'username': 'viewer',
+        'hashed_password': '$2b$12$DA7Nn4MVSr1m3Q0P6x1Qe.i6yd0qJ7Yx1C2VYLRNvKcJsteVEh9W6',
+        'disabled': False,
+        'role': 'viewer',
+    },
+}
+
+def verify_password(plain_password: str, hashed_password: str) -> bool:
+    return pwd_context.verify(plain_password, hashed_password)
+
 def get_user(username: str) -> Optional[UserInDB]:
     user = fake_users_db.get(username)
     return UserInDB(**user) if user else None
+
 def authenticate_user(username: str, password: str) -> Optional[UserInDB]:
     user = get_user(username)
     return user if user and verify_password(password, user.hashed_password) else None
+
 def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
     to_encode = data.copy()
     expire = datetime.now(timezone.utc) + (expires_delta or timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES))
     to_encode.update({'exp': expire})
     return jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
+
 def get_current_user(token: str = Depends(oauth2_scheme)) -> User:
     credentials_exception = HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail='Could not validate credentials', headers={'WWW-Authenticate': 'Bearer'})
     try:
         payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
         username: str = payload.get('sub')
-        if username is None: raise credentials_exception
+        if username is None:
+            raise credentials_exception
     except JWTError:
         raise credentials_exception
     user = get_user(username)
-    if user is None: raise credentials_exception
+    if user is None:
+        raise credentials_exception
     return User(username=user.username, disabled=user.disabled, role=user.role)
+
 def get_current_active_user(current_user: User = Depends(get_current_user)) -> User:
-    if current_user.disabled: raise HTTPException(status_code=400, detail='Inactive user')
+    if current_user.disabled:
+        raise HTTPException(status_code=400, detail='Inactive user')
     return current_user