text: from datetime import datetime
  from uuid import UUID
  
  from pydantic import BaseModel
  
  
  class SessionCheckin(BaseModel):
      classroom_id: UUID
      session_date: datetime
      attendee: UUID
  
  
  class SessionCheckout(BaseModel):
      attendee: UUID
  
  
  class AttendeeSessionCancellation(BaseModel):
      classroom_id: UUID
      session_date: datetime
  