fix: pull request is committer checking
diff --git a/index.js b/index.js
index 542578d..b3858c9 100644
--- a/index.js
+++ b/index.js
@@ -90,7 +90,7 @@
 
     app.on(['pull_request.opened'], async context => {
         // const auth = context.payload.pull_request.author_association;
-        const isCore = isCoreCommitter(context.payload.issue.user.login);
+        const isCore = isCoreCommitter(context.payload.pull_request.user.login);
         const comment = context.github.issues.createComment(context.issue({
             body: isCore ? text.PR_OPENED_BY_COMMITTER : text.PR_OPENED
         }));