my trivy works in one region and fails another: aws ECR

[icecream-monster]

Description

What did you expect to happen?

Image can be scanned in both regions

What happened instead?

scan only works in us-east-1

Output of run with -debug:

trivy --debug image {aws_account_id}.dkr.ecr.us-west-2.amazonaws.com/{path}
2021-05-31T21:17:59.410-0700	DEBUG	Severities: UNKNOWN,LOW,MEDIUM,HIGH,CRITICAL
2021-05-31T21:17:59.456-0700	DEBUG	cache dir:  /Users/estheray/Library/Caches/trivy
2021-05-31T21:17:59.457-0700	DEBUG	DB update was skipped because DB is the latest
2021-05-31T21:17:59.457-0700	DEBUG	DB Schema: 1, Type: 1, UpdatedAt: 2021-06-01 00:27:43.391427828 +0000 UTC, NextUpdate: 2021-06-01 12:27:43.391427428 +0000 UTC, DownloadedAt: 2021-06-01 03:36:18.378892 +0000 UTC
2021-05-31T21:17:59.459-0700	DEBUG	Vulnerability type:  [os library]
2021-05-31T21:18:00.444-0700	FATAL	scan error:
    github.com/aquasecurity/trivy/pkg/commands/artifact.runWithTimeout
        /home/runner/work/trivy/trivy/pkg/commands/artifact/run.go:67
  - unable to initialize a scanner:
    github.com/aquasecurity/trivy/pkg/commands/artifact.scan
        /home/runner/work/trivy/trivy/pkg/commands/artifact/run.go:157
  - unable to initialize a docker scanner:
    github.com/aquasecurity/trivy/pkg/commands/artifact.dockerScanner
        /home/runner/work/trivy/trivy/pkg/commands/artifact/image.go:29
  - 3 errors occurred:
	* unable to inspect the image ({aws_account_id}.dkr.ecr.us-west-2.amazonaws.com/{path}): Error: No such image: {aws_account_id}.dkr.ecr.us-west-2.amazonaws.com/{path}
	* unable to initialize Podman client: no podman socket found: stat podman/podman.sock: no such file or directory
	* GET https://{aws_account_id}.dkr.ecr.us-west-2.amazonaws.com/v2/{path}manifests/{tag}: DENIED: Your Authorization Token is invalid.

Output of trivy -v:

Version: 0.18.3
Vulnerability DB:
  Type: Light
  Version: 1
  UpdatedAt: 2021-06-01 00:27:43.391427828 +0000 UTC
  NextUpdate: 2021-06-01 12:27:43.391427428 +0000 UTC
  DownloadedAt: 2021-06-01 03:36:18.378892 +0000 UTC

Additional details (base image name, container registry info...):

AWS ECR

I have previous logged into aws ecr with:
aws ecr get-login-password --region us-west-2 | docker login --username AWS --password-stdin {aws_account_id}.dkr.ecr.us-west-2.amazonaws.com/{path}

[icecream-monster]

replica of: #1026

solved by setting default region in ~/.aws/config