fix error message for 403 when

packages/slack/src/utils/post-ephemeral-errors.ts

@@ -27,7 +27,7 @@ export const postEphemeralErrors = async(
 
           let errorMessage = reason;
           if (resDataMessage != null) {
-            errorMessage += ` (${resDataMessage})`;
+            errorMessage += `\n  Cause: ${resDataMessage}`;
           }
 
           return generateMarkdownSectionBlock(errorMessage);

src/server/routes/apiv3/slack-integration.js

@@ -25,7 +25,9 @@ module.exports = (crowi) => {
     });
 
     if (tokenPtoG == null || tokenPtoG !== correctToken) {
-      return res.status(403).send({ message: 'The access token that identifies the request source is slackbot-proxy is invalid.' });
+      return res.status(403).send({
+        message: 'The access token that identifies the request source is slackbot-proxy is invalid. Did you setup with `/growi register`?',
+      });
     }
 
     next();