input: Write a function to aggregate data from multiple APIs and store it in MongoDB.
  assert isinstance(aggregate_and_store_data(['url_1', 'url_2']), list)
  assert len(aggregate_and_store_data(['url_1', 'url_2'])) > 0
output: import requests
  from pymongo import MongoClient
  
  def aggregate_and_store_data(urls):
      client = MongoClient('mongodb://localhost:27017/')
      db = client['api_data']
      collection = db['aggregated_data']
      
      aggregated_data = []
      
      for url in urls:
          response = requests.get(url)
          if response.status_code == 200:
              data = response.json()
              aggregated_data.append(data)
              collection.insert_one(data)
      
      return aggregated_data