title: Amplify add storage - Auth configuration is required to allow unauthenticated users, but it is not configured properly
body: <p>I'm pretty sure I have cognito configured correctly because I can register, sign in, and sign out. Everything is configured in aws-exports. Anyone know how to debug this?</p>
  <pre><code>$ amplify add storage
  ? Please select from one of the below mentioned services: Content (Images, audio, video, etc.)
  ? Please provide a friendly name for your resource that will be used to label this category in the project: botshopsStorage
  ? Please provide bucket name: botshops
  ? Who should have access: Auth and guest users
  ? What kind of access do you want for Authenticated users? create/update, read, delete
  ? What kind of access do you want for Guest users? read
  ? Do you want to add a Lambda Trigger for your S3 Bucket? No
  Auth configuration is required to allow unauthenticated users, but it is not configured properly.
  An error occurred when adding the storage resource
  Error: Auth configuration is required to allow unauthenticated users, but it is not configured properly.
      at configure (C:\snapshot\node_modules\amplify-category-storage\lib\provider-utils\awscloudformation\service-walkthroughs\s3-walkthrough.js:405:11)
      at processTicksAndRejections (internal/process/task_queues.js:97:5)
      at async addWalkthrough (C:\snapshot\node_modules\amplify-category-storage\lib\provider-utils\awscloudformation\service-walkthroughs\s3-walkthrough.js:58:12)
      at async Object.executeAmplifyCommand (C:\snapshot\node_modules\amplify-category-storage\lib\index.js:114:3)
      at async executePluginModuleCommand (C:\snapshot\node_modules\@aws-amplify\cli\lib\execution-manager.js:163:5)
      at async Object.executeCommand (C:\snapshot\node_modules\@aws-amplify\cli\lib\execution-manager.js:35:9)
      at async Object.run (C:\snapshot\node_modules\@aws-amplify\cli\lib\index.js:112:9)
  
  micha@DESKTOP-P5RTAG7 MINGW64 ~/repos/botshops (master)
  $ amplify status
  
  Current Environment: dev
  
  | Category | Resource name    | Operation | Provider plugin   |
  | -------- | ---------------- | --------- | ----------------- |
  | Auth     | botshopsff8e5633 | No Change | awscloudformation |
  | Api      | botshops         | No Change | awscloudformation |
  </code></pre>