import csv, requests

H = {"ApiKey": "YOUR_API_KEY"}
params, users = {"username": "nasa"}, []
while True:
    page = requests.get("https://api.sorsa.io/v3/followers", headers=H, params=params).json()
    users += page.get("users", [])
    if not page.get("next_cursor"):
        break
    params["next_cursor"] = page["next_cursor"]

with open("followers.csv", "w", newline="", encoding="utf-8-sig") as f:
    w = csv.writer(f)
    w.writerow(["user_id", "username", "followers", "bio"])
    for u in users:
        w.writerow([u["id"], u["username"], u["followers_count"], u.get("description", "")])