os.system('cls')
banner()
input_file = sys.argv[1]
users = []
with open(input_file, encoding='UTF-8') as f:
    rows = csv.reader(f,delimiter=",",lineterminator="\n")
    next(rows, None)
    for row in rows:
        user = {}
        user['id'] = row[0]
        user['username'] = row[1]
        user['name'] = row[2]
        users.append(user)

chats = []
last_date = None
chunk_size = 5000
groups=[]