Error: ConfigError: Missing region in config

You must specify a region. You can also configure your region by running "aws configure".

This error is a not an DynamoDB specific error, it can happen with any AWS API/CLI/SDK command if you're not having a default AWS region setup in your environment variables or in credentials configuration.

There are a few ways to solve this error:

• You can set the AWS_DEFAULT_REGION environment variable to something like "us-east-1" (replace with region you're actually using).

  export AWS_DEFAULT_REGION=us-east-1

• If using AWS profiles, you can include the region in the ~/.aws/config file. Make sure following entry exists in this file:

  [profile my-profile]
  region=us-east-1

• If using CLI, you can end your command with --region=[region]

  aws dynamodb list-tables --endpoint-url http://localhost:8000 --region=us-east-1

• If using SDK, you pass the region you want to use into the DynamoDB service construtor. In Node.js case, it will look like this:

  import { DynamoDB } from "aws-sdk"
  
  const ddb = new DynamoDB({
    region: 'us-east-1'
  })