Electrs wont start of missing .cookie

hey hey
I run the umbrel OS 1.3 on y Pi 5
everything (BTC, LN) is synced and run well since weeks. So few days before I installed electrs, but it stucks at Connecting to Electrs server...

So I checked the logs, here what I found:

umbrel@umbrel:~$ docker logs bitcoin_bitcoind_1
2025-02-07T23:50:51Z Ignoring unknown configuration value maxtimeadjustment
2025-02-07T23:50:51Z Included configuration file umbrel-bitcoin.conf
2025-02-07T23:50:51Z Bitcoin Core version v28.0.0 (release build)
2025-02-07T23:50:51Z Script verification uses 3 additional threads
2025-02-07T23:50:51Z Using the 'arm_shani(1way,2way)' SHA256 implementation
2025-02-07T23:50:51Z Default data directory /data/.bitcoin
2025-02-07T23:50:51Z Using data directory /data/.bitcoin
2025-02-07T23:50:51Z Config file: /data/.bitcoin/bitcoin.conf
2025-02-07T23:50:51Z Config file arg: bantime="86400"
2025-02-07T23:50:51Z Config file arg: blockfilterindex="1"
2025-02-07T23:50:51Z Config file arg: datacarriersize="83"
2025-02-07T23:50:51Z Config file arg: dbcache="858"
2025-02-07T23:50:51Z Config file arg: i2pacceptincoming="0"
2025-02-07T23:50:51Z Config file arg: i2psam="10.21.22.11:7656"
2025-02-07T23:50:51Z Config file arg: includeconf="umbrel-bitcoin.conf"
2025-02-07T23:50:51Z Config file arg: listen="1"
2025-02-07T23:50:51Z Config file arg: listenonion="0"
2025-02-07T23:50:51Z Config file arg: maxconnections="125"
2025-02-07T23:50:51Z Config file arg: maxmempool="600"
2025-02-07T23:50:51Z Config file arg: maxorphantx="100"
2025-02-07T23:50:51Z Config file arg: maxreceivebuffer="5000"
2025-02-07T23:50:51Z Config file arg: maxsendbuffer="1000"
2025-02-07T23:50:51Z Config file arg: maxuploadtarget="0"
2025-02-07T23:50:51Z Config file arg: mempoolexpiry="336"
2025-02-07T23:50:51Z Config file arg: mempoolfullrbf="1"
2025-02-07T23:50:51Z Config file arg: onion="10.21.22.10:9050"
2025-02-07T23:50:51Z Config file arg: onlynet="ipv4"
2025-02-07T23:50:51Z Config file arg: onlynet="ipv6"
2025-02-07T23:50:51Z Config file arg: onlynet="onion"
2025-02-07T23:50:51Z Config file arg: onlynet="i2p"
2025-02-07T23:50:51Z Config file arg: peerblockfilters="1"
2025-02-07T23:50:51Z Config file arg: peertimeout="60"
2025-02-07T23:50:51Z Config file arg: persistmempool="1"
2025-02-07T23:50:51Z Config file arg: rpcallowip="192.168.0.0/16"
2025-02-07T23:50:51Z Config file arg: rpcbind="0.0.0.0"
2025-02-07T23:50:51Z Config file arg: rpcpassword=****
2025-02-07T23:50:51Z Config file arg: rpcport="8332"
2025-02-07T23:50:51Z Config file arg: rpcuser=****
2025-02-07T23:50:51Z Config file arg: rpcworkqueue="128"
2025-02-07T23:50:51Z Config file arg: server="1"
2025-02-07T23:50:51Z Config file arg: timeout="5000"
2025-02-07T23:50:51Z Config file arg: torcontrol="10.21.22.10:9051"
2025-02-07T23:50:51Z Config file arg: torpassword=****
2025-02-07T23:50:51Z Config file arg: txindex="1"
2025-02-07T23:50:51Z Config file arg: whitelist="10.21.0.0/16"
2025-02-07T23:50:51Z Config file arg: [main] bind="0.0.0.0:8333"
2025-02-07T23:50:51Z Config file arg: [main] bind="10.21.21.8:8334=onion"

I found this:
/home/umbrel/umbrel/app-data/bitcoin/data/bitcoin/umbrel-bitcoin.conf
or where is the used conf?

I have this within the /home/umbrel/umbrel/app-data/bitcoin/.env

export APP_BITCOIN_NETWORK='mainnet'
export APP_BITCOIN_RPC_USER='umbrel'
export APP_BITCOIN_RPC_PASS='vjVb9xxxxxxxxf_c='
export APP_BITCOIN_RPC_AUTH='umbrel:f1fxxxxxxdfb

As I see I have to tell electrs to use rpc instead of cookie, right? How where?

Solved: I had set RPC user and pw with botcoin.conf (/home/umbrel/umbrel/app-data/bitcoin/data/bitcoin/bitcoin.conf)
after commenting it out and restarting btc the .cookie file was generated.