find one token

packages/slack/src/interfaces/request-between-growi-and-proxy.ts

@@ -6,6 +6,8 @@ export type RequestFromGrowi = Request & {
 
   // will be extracted from header
   tokenGtoPs: string[],
+
+  tokenGtoP: string,
 };
 
 export type RequestFromProxy = Request & {

packages/slack/src/middlewares/verify-growi-to-slack-request.ts

@@ -10,6 +10,13 @@ const logger = loggerFactory('@growi/slack:middlewares:verify-slack-request');
  * See: https://api.slack.com/authentication/verifying-requests-from-slack
  */
 export const verifyGrowiToSlackRequest = (req: RequestFromGrowi, res: Response, next: NextFunction): Record<string, any> | void => {
+  // If it is single, set it and next.
+  const token = req.headers['x-growi-gtop-token'];
+  if (token != null) {
+    req.tokenGtoP = token as string;
+    return next();
+  }
+
   const str = req.headers['x-growi-gtop-tokens'];
 
   if (str == null) {