Credential should be scoped to a valid region when reaching DynamoDB from ECS

Question

I'm setting up an ECS instance for my backend that interacts with DynamoDB tables

The tasks are running, the healthcheck has passed and the tasks have been assigned with a role that should grant access to those tables

But when I call the API to interact with the database, it shows me this error

InvalidSignatureException: Credential should be scoped to a valid region.

The role contains this policies https://i.sstatic.net/h1Q14.png

And this are the env variables for the task definition

"environment": [
        {
          "name": "AWS_REGION",
          "value": "eu-west-2"
        },
        {
          "name": "DATABASE_URL",
          "value": "http://dynamodb.eu-west-2.amazonaws.com"
        },
        {
          "name": "PORT",
          "value": "3000"
        },
        {
          "name": "REFERRAL_CHARS",
          "value": "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
        },
        {
          "name": "USERS_TABLE",
          "value": "SparadoxUsers"
        }
      ],

Answer 1

This is not an issue with roles, more so the request itself. Typically you would see this issue when you sign a request for 1 region (eu-west-1) and the you submit that request to a second region (eu-west-2).

My suggestion is to take a close look at how you make your API call and how you define the region and endpoint in your DynamoDB client.