Table users {
  _id string [pk]
  __v integer
  avatar string
  createdAt string
  email string
  favorites array
  isActive boolean
  lastLogin string
  name string
  password string
  preferences object
  role string
  stats object
  updatedAt string
  username string
}

Table sessions {
  _id string [pk]
  __v integer
  createdAt string
  expiresAt string
  ip string
  isActive boolean
  issuedAt string
  sessionType string
  tokenId string
  updatedAt string
  userAgent string
  userId string
}

Table results {
  _id string [pk]
  __v integer
  answers array
  completedAt string
  createdAt string
  percentage integer
  quiz string
  score integer
  timeSpent integer
  updatedAt string
  user string
}

Table quizzes {
  _id string [pk]
  __v integer
  averageRating integer
  averageScore string
  category string
  createdAt string
  creator string
  description string
  difficulty string
  isFeatured boolean
  isPublic boolean
  passingScore integer
  questions array
  ratings array
  tags array
  timeLimit integer
  title string
  totalAttempts integer
  updatedAt string
}

Ref: sessions.userId > users._id

Ref: results.user > users._id

Ref: results.quiz > quizzes._id

Ref: quizzes.creator > users._id