Enhance GitHub Actions workflow for SmartThings CLI authentication

- Added ST_TOKEN environment variable for improved security in SmartThings CLI authentication.
- Updated authentication step to verify the presence of ST_TOKEN, ensuring clearer error handling and feedback during deployment.

Author: lunDreame

.github/workflows/deploy.yml

@@ -19,6 +19,8 @@ on:
 jobs:
   deploy:
     runs-on: ubuntu-latest
+    env:
+      ST_TOKEN: ${{ secrets.SMARTTHINGS_PERSONAL_ACCESS_TOKEN }}
 
     steps:
       - name: Checkout code
@@ -33,9 +35,14 @@ jobs:
         run: |
           npm install -g @smartthings/cli@latest
 
-      - name: Authenticate SmartThings CLI
+      - name: Verify SmartThings CLI authentication
         run: |
-          smartthings auth --token "${{ secrets.SMARTTHINGS_PERSONAL_ACCESS_TOKEN }}"
+          # SmartThings CLI uses ST_TOKEN environment variable for authentication
+          if [[ -z "$ST_TOKEN" ]]; then
+            echo "ERROR: ST_TOKEN environment variable is not set"
+            exit 1
+          fi
+          echo "SmartThings CLI authentication configured via ST_TOKEN"
 
       - name: Setup dependencies
         run: |