@activate_pipeline("lol") KeyError 'backend'

[renja-g]

Sorry for creating an issue for this, but I don't know where I would otherwise get help from.
I am wondering what this error means:

Exception has occurred: KeyError
'backend'
  File "C:\Users\XXX\Realm-Wrap\backend\utils\pyotconf.py", line 18, in <module>
    @activate_pipeline("lol")
     ^^^^^^^^^^^^^^^^^^^^^^^^
KeyError: 'backend'

I get this error when loading the pyotconf.py
I copied the pyotconf.py mostly from the docs and just made some minor changes, so I don't know what the problem is, since the error is not that much of a help.

from pyot.conf.model import activate_model, ModelConf
from pyot.conf.pipeline import activate_pipeline, PipelineConf
from dotenv import load_dotenv
import os

# Load env variables
load_dotenv(os.path.join(os.path.dirname(__file__), "..", ".env"))


@activate_model("lol")
class LolModel(ModelConf):
    default_platform = "euw1"
    default_region = "europe"
    default_version = "latest"
    default_locale = "en_us"


@activate_pipeline("lol")
class LolPipeline(PipelineConf):
    name = "lol_main"
    default = True
    stores = [
        {
            "BACKEND": "pyot.stores.riotapi.RiotAPI",
            "API_KEY": os.getenv("RIOT_API_KEY"),
            "RATE_LIMITER": {
                "BACKEND": "pyot.limiters.redis.RedisLimiter",
                "HOST": "redis",
                "PORT": 6379,
                "DB": 0,
                "LIMITING_SHARE": 0.9,
            }
        }
    ]

[iann838]

"backend" not "BACKEND", same goes for the rest of the items in stores, please revise the documentation at https://pyot.iann838.com/cores/configuration. Pyot has remained unchanged for two years already, the uppercase keys were only used in ancient versions of this project.

[renja-g]

ahh, I looked at a repo of yours, that's why I thought I could write it uppercase, but yea, it is a bit older, thanks for your help.

And while I'm here, I also wanted to say that I really like how Pyot is build!
Thanks!