fix: 🐛 error message fix on refresh token error

lib/core/concurrency-queue.js

@@ -147,13 +147,13 @@ export function ConcurrencyQueue ({ axios, config }) {
         axios.httpClientParams.headers.authtoken = token.authtoken
         this.config.authtoken = token.authtoken
       }
-    }).catch(() => {
+    }).catch((error) => {
       this.queue.forEach(queueItem => {
         queueItem.reject({
           errorCode: '401',
-          errorMessage: 'Unable to refresh token',
+          errorMessage: (error instanceof Error) ? error.message : error,
           code: 'Unauthorized',
-          message: 'Request failed with status code 401',
+          message: 'Unable to refresh token',
           name: 'Token Error',
           config: queueItem.request
         })

lib/stack/roles/index.js

@@ -1,7 +1,5 @@
 import cloneDeep from 'lodash/cloneDeep'
 import { create, update, deleteEntity, fetch, query, fetchAll } from '../../entity'
-import ContentstackCollection from '../../contentstackCollection'
-import error from '../../core/contentstackError'
 /**
  * A role is a collection of permissions that will be applicable to all the users who are assigned this role. Read more about <a href= 'https://www.contentstack.com/docs/guide/users-and-roles#roles'>Roles</a>.
  * @namespace Role

test/unit/concurrency-Queue-test.js

@@ -163,6 +163,26 @@ describe('Concurrency queue test', () => {
       .catch(done)
   })
 
+  it('should give passed error message when refreshToken function fails', done => {
+    const axios = client({
+      baseURL: `${host}:${port}`,
+      authorization: 'Bearer <token_value>',
+      logHandler: logHandlerStub,
+      refreshToken: () => {
+        return new Promise((resolve, reject) => {
+          reject(new Error('Rejected in Promise'))
+        })
+      }
+    })
+    Promise.all(sequence(3).map(() => axios.axiosInstance.get('/unauthorized')))
+      .catch(err => {
+        expect(err.errorCode).to.equal('401')
+        expect(err.errorMessage).to.equal('Rejected in Promise')
+        expect(err.message).to.equal('Unable to refresh token')
+        done()
+      })
+  })
+
   it('Initialize with bad axios instance', done => {
     try {
       new ConcurrencyQueue({ axios: undefined })