def create_ticket(user_id: str, issue_type: str) -> str:
  """Create a new support ticket for a user.

  Args:
      user_id (str): The unique identifier of the user creating the ticket.
      issue_type (str): An issue type the user is facing. Available types:
        'LOGIN_ISSUE', 'ORDER_ISSUE', 'OTHER'.

  Returns:
      str: A message indicating that the ticket was created successfully,
      including the ticket ID.
  """
  ticket_id = str(len(TICKET_DB) + 1)
  TICKET_DB.append({
      "ticket_id": ticket_id,
      "user_id": user_id,
      "issue_type": issue_type,
      "status": "OPEN",
  })
  return f"Ticket {ticket_id} created successfully."
Create a new support ticket for a user.

  Args:
      user_id (str): The unique identifier of the user creating the ticket.
      issue_type (str): An issue type the user is facing. Available types:
        'LOGIN_ISSUE', 'ORDER_ISSUE', 'OTHER'.

  Returns:
      str: A message indicating that the ticket was created successfully,
      including the ticket ID.
  
tests/integration/fixture/ecommerce_customer_service_agent/agent.py