diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index b4a7fb7..b15f849 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,4 +1,6 @@
 name: Test Alpacon CP Action
+permissions:
+  contents: read
 
 on:
   push:
@@ -83,4 +85,47 @@ jobs:
           source: './test-dir/'
           target-server: ${{ secrets.TEST_ALPACON_SERVER_NAME }}
           target-path: '/tmp/test-upload-dir/'
-          recursive: true
\ No newline at end of file
+          recursive: true
+
+  test-upload-with-username:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Alpacon CLI
+        uses: alpacax/alpacon-setup-action@v1.0.0
+
+      - name: Create test file
+        run: echo "Test content with username" > test-file-username.txt
+
+      - name: Test File Upload with username
+        uses: ./
+        with:
+          workspace-url: ${{ secrets.TEST_ALPACON_WORKSPACE_URL }}
+          api-token: ${{ secrets.TEST_ALPACON_API_TOKEN }}
+          source: './test-file-username.txt'
+          target-server: ${{ secrets.TEST_ALPACON_SERVER_NAME }}
+          target-path: '/tmp/test-upload-username.txt'
+          username: root
+
+      - name: Test File Download with username
+        uses: ./
+        with:
+          workspace-url: ${{ secrets.TEST_ALPACON_WORKSPACE_URL }}
+          api-token: ${{ secrets.TEST_ALPACON_API_TOKEN }}
+          source: '/tmp/test-upload-username.txt'
+          target-server: ${{ secrets.TEST_ALPACON_SERVER_NAME }}
+          target-path: './'
+          mode: download
+          username: root
+
+      - name: Verify downloaded file
+        run: |
+          if [ -f "test-upload-username.txt" ]; then
+            echo "✅ File with username option downloaded successfully"
+            cat test-upload-username.txt
+          else
+            echo "❌ File download with username failed"
+            exit 1
+          fi
\ No newline at end of file
diff --git a/README.md b/README.md
index 6a9a38d..49c9aae 100644
--- a/README.md
+++ b/README.md
@@ -33,19 +33,20 @@ This action requires the Alpacon CLI to be installed in your workflow. Use the [
 ### Upload a file to a remote server
 ```yaml
 - name: Upload File
-  uses: alpacax/alpacon-cp-action@v1.0.0
+  uses: alpacax/alpacon-cp-action@v1.0.1
   with:
     workspace-url: ${{ secrets.ALPACON_WORKSPACE_URL }}
     api-token: ${{ secrets.ALPACON_API_TOKEN }}
     source: './data/file.txt'
     target-server: 'worker1'
     target-path: '/data/file.txt'
+    username: ubuntu
 ```
 
 ### Download a file from a remote server
 ```yaml
 - name: Download File
-  uses: alpacax/alpacon-cp-action@v1.0.0
+  uses: alpacax/alpacon-cp-action@v1.0.1
   with:
     workspace-url: ${{ secrets.ALPACON_WORKSPACE_URL }}
     api-token: ${{ secrets.ALPACON_API_TOKEN }}
@@ -53,12 +54,13 @@ This action requires the Alpacon CLI to be installed in your workflow. Use the [
     target-server: 'worker1'
     target-path: './data/'  # Directory path - file will be saved as './data/file.txt'
     mode: download
+    username: ubuntu
 ```
 
 ### Upload a directory recursively
 ```yaml
 - name: Upload Directory
-  uses: alpacax/alpacon-cp-action@v1.0.0
+  uses: alpacax/alpacon-cp-action@v1.0.1
   with:
     workspace-url: ${{ secrets.ALPACON_WORKSPACE_URL }}
     api-token: ${{ secrets.ALPACON_API_TOKEN }}
@@ -66,12 +68,13 @@ This action requires the Alpacon CLI to be installed in your workflow. Use the [
     target-server: 'worker1'
     target-path: '/data/'
     recursive: true
+    username: ubuntu
 ```
 
 ### Download a directory recursively
 ```yaml
 - name: Download Directory
-  uses: alpacax/alpacon-cp-action@v1.0.0
+  uses: alpacax/alpacon-cp-action@v1.0.1
   with:
     workspace-url: ${{ secrets.ALPACON_WORKSPACE_URL }}
     api-token: ${{ secrets.ALPACON_API_TOKEN }}
@@ -80,6 +83,7 @@ This action requires the Alpacon CLI to be installed in your workflow. Use the [
     target-path: './data/'
     mode: download
     recursive: true
+    username: ubuntu
 ```
 
 ## Inputs
@@ -93,6 +97,8 @@ This action requires the Alpacon CLI to be installed in your workflow. Use the [
 | target-path    | Destination path (remote for upload, local for download).                   | Yes      |
 | mode           | "upload" (default) or "download".                                         | No       |
 | recursive      | Set to true to copy directories recursively.                                | No       |
+| username       | Username for server authentication (optional).                              | No       |
+| groupname      | Group name for server authentication (optional).                            | No       |
 
 ## Notes
 
diff --git a/action.yml b/action.yml
index 4405047..24e9406 100644
--- a/action.yml
+++ b/action.yml
@@ -30,6 +30,12 @@ inputs:
     description: 'Set to true to copy directories recursively (-r option).'
     required: false
     default: 'false'
+  username:
+    description: 'Username to execute the command as (e.g., root, ubuntu).'
+    required: false
+  groupname:
+    description: 'Group name to execute the command as.'
+    required: false
 
 runs:
   using: "composite"
@@ -39,10 +45,23 @@ runs:
       shell: bash
     - name: Execute CP
       run: |
+        # Validate groupname requires username
+        if [[ -z "${{ inputs.username }}" && -n "${{ inputs.groupname }}" ]]; then
+          echo "Error: groupname requires username to be specified"
+          exit 1
+        fi
+
+        # Build command with optional flags
         CP_CMD="alpacon cp"
         if [ "${{ inputs.recursive }}" = "true" ]; then
           CP_CMD="$CP_CMD -r"
         fi
+        if [[ -n "${{ inputs.username }}" && -n "${{ inputs.groupname }}" ]]; then
+          CP_CMD="$CP_CMD -u ${{ inputs.username }} -g ${{ inputs.groupname }}"
+        elif [[ -n "${{ inputs.username }}" ]]; then
+          CP_CMD="$CP_CMD -u ${{ inputs.username }}"
+        fi
+
         if [ "${{ inputs.mode }}" = "download" ]; then
           $CP_CMD ${{ inputs.target-server }}:${{ inputs.source }} ${{ inputs.target-path }}
         else