CodeBuild Project fails for a Private registry with AWS Secrets Manager with BUILD_CONTAINER_UNABLE_TO_PULL_IMAGE

Question

Followed https://docs.aws.amazon.com/codebuild/latest/userguide/sample-private-registry.html to create a CodeBuild project manually. Secret Manager is being used to store the docker hub credentials . I am trying to pull "hashicorp/terraform:1.3.7". IAM role  used here has the following IAM policy attached:

Excerpt from terraforms file: 
 statement {
    sid       = ""
    actions   = ["secretsmanager:GetSecretValue"]
    resources = ["*"]
    effect = "Allow"
  }

statement {
    sid       = ""
    actions   = ["logs:*","codebuild:*","s3:*", "iam:*"]
    resources = ["*"]
    effect = "Allow"
  }

The code build project fails :

PROVISIONING	
Client error
BUILD_CONTAINER_UNABLE_TO_PULL_IMAGE: Unable to pull customer's container image. CannotPullContainerError: Error response from daemon: Head "https://registry-1.docker.io/v2/hashicorp/terraform/manifests/1.3.7": unauthorized: incorrect username or password

Answer

Before trying it out manually, I was using this sample repo where others are also facing the same issue: https://github.com/davoclock/aws-cicd-pipeline/issues/6

CodeBuild Project fails for a Private registry with AWS Secrets Manager with BUILD_CONTAINER_UNABLE_TO_PULL_IMAGE

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