new_contents: import io, json
  from utils import ObjectMaker
  
  maker = ObjectMaker()
  with io.open('generated_participants.json', 'wb') as f:
      for i in range(1, 5000000):
          phone = "+256"+ str(i) 
          p = maker.mkobj_participant_v2(participant_phone=phone)
          json.dump(p, f)
          f.write("\n")
          
      
      
subject: add test script to generate big file of participant