from datetime import datetime


def get_time_delta(start_time: str, end_time: str):
    """Returns the difference between two times in minutes"""
    t1 = datetime.strptime(start_time, "%Y-%m-%d_%H-%M-%S")
    t2 = datetime.strptime(end_time, "%Y-%m-%d_%H-%M-%S")

    delta = t2 - t1

    return int(delta.seconds / 60)