Server error: Not authorized to call Chime SDK with Account Id

**Demo**
[Specify the name of the demo that you encountered the bug.](https://github.com/aws-samples/amazon-chime-sdk/tree/main/apps/meeting)

**Describe the bug**
Server error: Not authorized to call Chime SDK with Account Id while I'm using access key with IAM user who has "Admin" role

**To Reproduce**
Steps to reproduce the behavior:
1. Set up aws configure with access key using cli "aws configure"
2. Did the npm install
3. Did npm start
4. Create an meetingID with my chime account
5. Join the meeting ID from 0.0.0.0:900
6. Then error appeared

**Expected behavior**
Should be join the meeting since I can join the meetingID from https://app.chime.aws/ like a guest

**Screenshots**
If applicable, add screenshots to help explain your problem.

**Desktop (please complete the following information):**
- OS: [e.g. iOS]
- Browser chrome
- Version [e.g. 22]

**Smartphone (please complete the following information):**
- Device: [e.g. iPhone6]
- OS: [e.g. iOS8.1]
- Browser [e.g. stock browser, safari]
- Version [e.g. 22]

**Additional context**
Add any other context about the problem here.

The demo is in apps/meeting; start by checking the AWS CLI credentials configured before npm start and reproduce the authorization error after joining a meeting ID. Compare the account and IAM permissions used by the demo with the account that created the meeting; done means the local demo joins the meeting without the server authorization error.

Written by the indexing model from the issue text.