fix admin password issue

docs/admin/resources/common-issues.md

@@ -73,4 +73,25 @@ This can pose a security risk in shared or multi-user environments. Make sure to
 
 :::
 
-Ensure you apply this to all relevant folders that are mounted into your containers. This will grant the Docker container the necessary permissions to access and write to these directories.
+Ensure you apply this to all relevant folders that are mounted into your containers. This will grant the Docker container the necessary permissions to access and write to these directories.
+
+---
+
+### Change Admin-Passwort in .env file
+
+If you set an admin password in the .env file during the initial setup of OpenCloud, you CANNOT simply change it in the file again.<br/>
+There are two ways to change the password:
+
+#### 1. Web UI
+The admin can change the password in the web UI if the admin password is known.
+If the password is unknown or the user does not want to make the change in the web UI, there is still the option via the terminal.
+
+#### 2. Terminal
+If the admin password has been forgotten or you want to make the change via the terminal, you must enter the following command in the terminal to reset the password:
+
+**Example for Docker:**
+```bash
+sudo docker run -it --rm \ -v < opencloud-data-path>:/var/lib/opencloud \ -v <opencloud-config-path>:/etc/opencloud \ opencloudeu/opencloud:<opencloud-version> idm resetpassword
+```
+
+Once the command has been successfully executed in the terminal and the password has been reset, it can be reassigned in the .env file.