fix

app/controller/gjj/wechat.js

+'use strict';
+
+const Controller = require('egg').Controller;
+class WechatController extends Controller {
+
+
+    async oauthLogin() {
+
+        const { ctx } = this;
+        const result = {};
+        ctx.success(result);
+        
+    }
+
+
+}
+module.exports = WechatController;

app/service/gjj/wechat.js

+'use strict';
+const Service = require('egg').Service;
+
+class WechatService extends Service {
+
+    
+    async oauthLogin() {
+        const { ctx } = this;
+        const result = {};
+        ctx.success(result);
+    }
+
+}
+
+module.exports = WechatService;