Update CLI auth docs to use client credentials instead of email/password

Author: shyim

products/cli/shopware-account-commands/authentication.md

@@ -17,8 +17,4 @@ shopware-cli account login
 
 and it will open a browser window for you to log in.
 
-For CI/CD pipelines, you should pass `SHOPWARE_CLI_ACCOUNT_EMAIL` and `SHOPWARE_CLI_ACCOUNT_PASSWORD` as environment variables and call directly the command you want to use.
-
-::: info
-For CI/CD tasks you should create a dedicated Shopware Account with limited access to the Shopware Store.
-:::
+For CI/CD pipelines, you should pass `SHOPWARE_CLI_ACCOUNT_CLIENT_ID` and `SHOPWARE_CLI_ACCOUNT_CLIENT_SECRET` as environment variables and call directly the command you want to use. The client ID and client secret can be generated in the **Extension Partner** section under the [Development](https://account.shopware.com/producer/development) navigation point in the [Shopware Account](https://account.shopware.com).