InterSystems IRIS Data Platform Container changePassword not working

Hey, 

I am pretty new to Docker and everything around that. I installed the container image from DockerHub and followed the instructions (https://hub.docker.com/_/intersystems-iris-data-platform/plans/222f869e-567c-4928-b572-eb6a29706fbd?tab=instructions). Everything is working fine except for the part where I want to change the default password.

I followed the instructions from this article (https://community.intersystems.com/post/using-intersystems-iris-containers-docker-windows) and the result was:

docker run --name iris3 --detach --publish 9091:51773 --publish 9092:52773 --volume C:\Users\user1\Desktop\TL5\DockerProjekt\warenverwaltung\container\IRISDataPlatform\password:/external 92ecaf86671c --before "cp /external/password.txt /external/password_copied.txt && /usr/irissys/dev/Cloud/ICM/changePassword.sh /durable/password_copied.txt"

The problem was that "changePassword.sh" doesnt exist inside the container. So I deleted the --before part to start the container and get inside it. I followed the path and saw that there are just "changePasswordHash.sh" and "changePasswordCSP.sh".  Using "changePasswordCSP.sh" resulted in a permission denied error, but "changePasswordHash.sh" seems to work - The container is up and running and i am able to open the management portal. 

The next problem is that I cant login with my password written in password.txt. I just typed "admin" in password.txt but when I try to login with 

Username: _SYSTEM

PW: admin

it fails. Same for

Username: Admin

PW: admin

Even the login via _SYSTEM and SYS isnt working anymore.

Do you know what I am doing wrong?

Info: 92ecaf is my Container Image ID becauer I used a Dockerfile to build a new image for testing. Also i am using a Windows Machine with Docker Desktop installed