```release-note:feature
iam: Adds `read-policy`, `set-policy`, `add-binding`, and `delete-binding` subcommands to `hcp iam groups iam` which allow the ability to manage an IAM policy on a group.
- `read-policy` Reads an IAM policy for a specified group.
- `set-policy` Sets an IAM policy for a group using a JSON file.
- `add-binding` Adds a single role binding to a user principal.
- `delete-binding` Removes a single role binding from a user principal.
```