gcloud alpha iam policies update

NAME
gcloud alpha iam policies update - update the policy on the given attachment point with the given name
SYNOPSIS
gcloud alpha iam policies update POLICY_ID --attachment-point=ATTACHMENT_POINT --kind=KIND --policy-file=POLICY_FILE [--etag=ETAG] [GCLOUD_WIDE_FLAG …]
DESCRIPTION
(ALPHA) Update the policy on the given attachment point with the given name.
EXAMPLES
The following command updates the IAM policy my-deny-policy, which is attached to the resource project 123 and has the etag abc: 
gcloud alpha iam policies update my-deny-policy --attachment-point=cloudresourcemanager.googleapis.com/projects/123 --kind=denypolicies --policy-file=policy.json --etag=abc
POSITIONAL ARGUMENTS
POLICY_ID
Policy ID that is unique for the resource to which the policy is attached.
REQUIRED FLAGS
--attachment-point=ATTACHMENT_POINT
Resource to which the policy is attached. For valid formats, see https://cloud.google.com/iam/help/deny/attachment-point.
--kind=KIND
Policy type. Use denypolicies for deny policies.
--policy-file=POLICY_FILE
Path to the file that contains the policy, in JSON or YAML format. For valid syntax, see https://cloud.google.com/iam/help/deny/policy-syntax.
OPTIONAL FLAGS
--etag=ETAG
Etag that identifies the version of the existing policy. It can be obtained by running gcloud iam policies get. When deleting a policy, if the etag is omitted, the policy is deleted regardless of its current etag. When updating a policy, if the etag is omitted, the update uses the etag provided in the policy file.
GCLOUD WIDE FLAGS
These flags are available to all commands: --access-token-file, --account, --billing-project, --configuration, --flags-file, --flatten, --format, --help, --impersonate-service-account, --log-http, --project, --quiet, --trace-token, --user-output-enabled, --verbosity.

Run $ gcloud help for details.

NOTES
This command is currently in alpha and might change without notice. If this command fails with API permission errors despite specifying the correct project, you might be trying to access an API with an invitation-only early access allowlist. These variants are also available: 
gcloud iam policies update
 
gcloud beta iam policies update