n8n 셀프호스팅에서 Gmail 연동, 드디어 성공한 그 여정

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        "resource": "draft",
        "subject": "n8n-gamil test",
        "emailType": "html",
        "message": "<!DOCTYPE html> <html lang=\"ko\"> <head>     <meta charset=\"UTF-8\">     <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">     <title>지피터스 AI스터디 17기 환영합니다</title> </head> <body style=\"margin: 0; padding: 0; font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; background: linear-gradient(135deg, #ff6b35, #f7931e); min-height: 100vh;\">          <table cellpadding=\"0\" cellspacing=\"0\" border=\"0\" width=\"100%\" style=\"background: linear-gradient(135deg, #ff6b35, #f7931e); min-height: 100vh;\">         <tr>             <td>                 <!-- Header -->                 <div style=\"background: #ff6b35; padding: 15px 0; text-align: center; box-shadow: 0 2px 10px rgba(0,0,0,0.1);\">                     <div style=\"color: white; font-size: 18px; font-weight: 500;\">                         🧠 가장 빠르게 AI를 배우는 곳 | 지피터스 AI스터디 17기 🚀                     </div>                 </div>                  <!-- Main Container -->                 <div style=\"padding: 40px 20px; text-align: center;\">                                          <!-- Welcome Card -->                     <div style=\"background: rgba(255, 255, 255, 0.95); border-radius: 20px; padding: 60px 40px; text-align: center; max-width: 800px; margin: 0 auto; box-shadow: 0 20px 40px rgba(0,0,0,0.1);\">                                                  <h1 style=\"font-size: 2.5rem; font-weight: 700; color: #333; margin-bottom: 30px; line-height: 1.3; word-break: keep-all;\">                             나만 빼고 모두가 쓰는 느낌이라면?                         </h1>                                                  <p style=\"font-size: 1.4rem; color: #666; margin-bottom: 40px; font-weight: 400; word-break: keep-all;\">                             최신의 AI를 배우고 빠르게 활용하세요                         </p>                                                  <div style=\"font-size: 3.5rem; font-weight: 800; color: #ff6b35; margin: 40px 0; text-shadow: 2px 2px 4px rgba(0,0,0,0.1); word-break: keep-all;\">                             지피터스 AI스터디 17기                         </div>                                                  <div style=\"margin: 50px 0;\">                             <div style=\"font-size: 1.2rem; color: #555; margin: 15px 0; font-weight: 500; word-break: keep-all;\">                                 📚 20+의 다양한 주제를                             </div>                             <div style=\"font-size: 1.2rem; color: #555; margin: 15px 0; font-weight: 500; word-break: keep-all;\">                                 🔥 한 번의 신청으로 모두 공부해요                             </div>                         </div>                                                  <p style=\"font-size: 1.1rem; color: #666; margin: 40px 0 30px 0; font-weight: 500; word-break: keep-all;\">                             (오늘 중으로) 빠르게 등록하세요!                         </p>                                                  <a href=\"#\" style=\"display: inline-block; background: linear-gradient(45deg, #ff6b35, #f7931e); color: white; padding: 15px 40px; border: none; border-radius: 50px; font-size: 1.1rem; font-weight: 600; text-decoration: none; box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);\">                             지금 등록하기 ▶                         </a>                                                  <div style=\"background: linear-gradient(45deg, #ff6b35, #f7931e); -webkit-background-clip: text; -webkit-text-fill-color: transparent; font-size: 1.3rem; font-weight: 600; margin-top: 40px; padding: 20px; border: 2px solid #ff6b35; border-radius: 15px; background-color: rgba(255, 107, 53, 0.05); word-break: keep-all; color: #ff6b35;\">                             🎉 17기 노션스터디에 오신 여러분을 진심으로 환영합니다! 🎉<br>                             함께 AI의 무한한 가능성을 탐험하며 성장해나가요!                         </div>                                              </div>                 </div>             </td>         </tr>     </table> </body> </html>",
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      "type": "n8n-nodes-base.gmail",
      "typeVersion": 2.1,
      "position": [
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      "id": "c4e374cf-80eb-4e6b-a6c6-62275c9fa067",
      "name": "Gmail",
      "webhookId": "67c4f194-dcb5-4779-a815-d438da6142b4",
      "credentials": {
        "gmailOAuth2": {
          "id": "f8qm6Lwq6J0YN8BN",
          "name": "n8n-gmail v001"
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            "node": "Gmail",
            "type": "main",
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