我无法使用github action通过ssh连接到AWS EC2 Ubuntu示例。
这是我的github action工作流程

name: Testing

on:
  push:
    branches:
      - test

jobs:
  test:
    ...

  deploy:
    name: Deploy to UAT
    needs: integration-test

    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2

      - name: Configure AWS credentials
        uses: aws-actions/configure-aws-credentials@v1
        with:
          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID  }}
          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
          aws-region: ${{ secrets.AWS_REGION }}

      - name: Deploy to EC2 instance
        run: ssh -o StrictHostKeyChecking=no ${{ secrets.AWS_INSTANCE_IP }} "cd /var/www/html/api/uat && git pull && composer install --no-dev && php artisan migrate:seed && php artisan optimize"

字符串
deploy作业一直运行到Deploy to EC2 instance，并出现以下错误：

Run ssh -o StrictHostKeyChecking=no *** "cd /var/www/html/api/uat && git pull && composer install --no-dev && php artisan migrate:seed && php artisan optimize"
  ssh -o StrictHostKeyChecking=no *** "cd /var/www/html/api/uat && git pull && composer install --no-dev && php artisan migrate:seed && php artisan optimize"
  shell: /usr/bin/bash -e {0}
  env:
    AWS_DEFAULT_REGION: ***
    AWS_REGION: ***
    AWS_ACCESS_KEY_ID: ***
    AWS_SECRET_ACCESS_KEY: ***
Warning: Permanently added '***' (ED25519) to the list of known hosts.
runner@***: Permission denied (publickey).
Error: Process completed with exit code 255.

型
我做错了什么？