[Enhancement]: get caller identity

[nicks]

Description

right now our acceptance tests want to create and delete resources owned by the current user. So they need some way to get the current user.

In the AWS provider, this is handled as
https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/caller_identity

Affected Resource(s) and/or Data Source(s)

No response

Potential Terraform Configuration

data "docker_caller_identity" "current" {}

output "username" {
  value = data.docker_caller_identity.current.username
}

References

No response

Would you like to implement a fix?

None