```

### 2. Create a sample OPA Policy

In another terminal, create a policy that allows root user all access and for all other users denies `PutObject`:

```sh
cat > example.rego <<EOF
package httpapi.authz

import input

default allow = false

# Allow the root user to perform any action.
allow {
 input.owner == true
}

# All other users may do anything other than call PutObject
allow {

		return config.DefaultHelpPostfix(DefaultKVS, key)
	}

	Help = config.HelpKVS{
		config.HelpKV{
			Key:         URL,
			Description: `[DEPRECATED] OPA HTTP(s) endpoint e.g. "http://localhost:8181/v1/data/httpapi/authz/allow"` + defaultHelpPostfix(URL),
			Type:        "url",
			Sensitive:   true,
		},
		config.HelpKV{
			Key:         AuthToken,

	}

	// Handle large OPA responses when OPA URL is of
	// form http://localhost:8181/v1/data/httpapi/authz
	type opaResultAllow struct {
		Result struct {
			Allow bool `json:"allow"`
		} `json:"result"`
	}

	// Handle simpler OPA responses when OPA URL is of
	// form http://localhost:8181/v1/data/httpapi/authz/allow
	type opaResult struct {
		Result bool `json:"result"`
	}

	}

	// Handle large OPA responses when OPA URL is of
	// form http://localhost:8181/v1/data/httpapi/authz
	type opaResultAllow struct {
		Result struct {
			Allow bool `json:"allow"`
		} `json:"result"`
	}

	// Handle simpler OPA responses when OPA URL is of
	// form http://localhost:8181/v1/data/httpapi/authz/allow
	type opaResult struct {
		Result bool `json:"result"`
	}

		return config.DefaultHelpPostfix(DefaultKVS, key)
	}

	Help = config.HelpKVS{
		config.HelpKV{
			Key:         URL,
			Description: `plugin hook endpoint (HTTP(S)) e.g. "http://localhost:8181/v1/data/httpapi/authz/allow"` + defaultHelpPostfix(URL),
			Type:        "url",
			Sensitive:   true,
		},
		config.HelpKV{
			Key:         AuthToken,

KEY:
policy_plugin  enable Access Management Plugin for policy enforcement

ARGS:
MINIO_POLICY_PLUGIN_URL*          (url)       plugin hook endpoint (HTTP(S)) e.g. "http://localhost:8181/v1/data/httpapi/authz/allow"
MINIO_POLICY_PLUGIN_AUTH_TOKEN    (string)    authorization header for plugin hook endpoint
MINIO_POLICY_PLUGIN_ENABLE_HTTP2  (bool)      Enable experimental HTTP2 support to connect to plugin service (default: 'off')