Challenge.spec.solver.dns01.route53.region

Override the AWS region. Route53 is a global service and does not have regional endpoints but the region specified here (or via environment variables) is used as a hint to help compute the correct AWS credential scope and partition when it connects to Route53. See: - [Amazon Route 53 endpoints and quotas](https://docs.aws.amazon.com/general/latest/gr/r53.html) - [Global services](https://docs.aws.amazon.com/whitepapers/latest/aws-fault-isolation-boundaries/global-services.html) If you omit this region field, cert-manager will use the region from AWS_REGION and AWS_DEFAULT_REGION environment variables, if they are set in the cert-manager controller Pod. The `region` field is not needed if you use [IAM Roles for Service Accounts (IRSA)](https://docs.aws.amazon.com/eks/latest/userguide/iam-roles-for-service-accounts.html). Instead an AWS_REGION environment variable is added to the cert-manager controller Pod by: [Amazon EKS Pod Identity Webhook](https://github.com/aws/amazon-eks-pod-identity-webhook). In this case this `region` field value is ignored. The `region` field is not needed if you use [EKS Pod Identities](https://docs.aws.amazon.com/eks/latest/userguide/pod-identities.html). Instead an AWS_REGION environment variable is added to the cert-manager controller Pod by: [Amazon EKS Pod Identity Agent](https://github.com/aws/eks-pod-identity-agent), In this case this `region` field value is ignored.