def member_status(client):
    """
    Return the member status string
    # https://docs.mongodb.com/manual/reference/command/replSetGetStatus/
    """
    myStateStr = None
    rs = client.admin.command('replSetGetStatus')
    for member in rs["members"]:
        if "self" in member.keys():
            myStateStr = member["stateStr"]
    return myStateStr