DB Design.js

users: {
  id: 'guid',
  email: '',
  screenName,
  password,
  broadcasts: {
    scheduled: ['guid'],
    subscriptions: ['guid']
  },
  avatar: 's3url',
  topics: ['guid'],
  timezone,
  timestamp: {
    createdAt,
    updatedAt
  }
}

channels: {
  id,
  topics: ['guid'],
  class: '',
  title,
  description,
  timestamp: {
    createdAt,
    updatedAt
  }
}

topics: {
  id,
  title
}

ratings: {
  id,
  broadcastId,
  subscriberId,
  hostId,
  value,
  timestamp: {
    createdAt
  }
}

comments: {
  id,
  broadcastId,
  subscriberId,
  comment,
  timestamp: {
    createdAt
  }
}

broadcasts: {
  id,
  scheduled: {
    planned,
    actual
  },
  duration: {
    planned,
    actual
  },
  topicId,
  host: {
    id,
    screenName
  },
  title,
  description,
  image,
  sessionId,
  timestamp: {
    createdAt,
    updatedAt,
    deletedAt
  }
}