Client error: `POST https://api.amazon.com/auth/o2/token` resulted in a `400 Bad Request` response:
{"error_index":"rgskY54AEO4B_73PgxTbwwAAAAAAAAABIA40Ha0p8Z-5UfvLxGKI4pgyHjHjrptRht3Ex2kkLl3SduCwTmMnSV44sHhkYBG1qnwne5Kq (truncated...)