code: func (c *Redshift) AuthorizeSnapshotAccess(input *AuthorizeSnapshotAccessInput) (*AuthorizeSnapshotAccessOutput, error) {
  	req, out := c.AuthorizeSnapshotAccessRequest(input)
  	return out, req.Send()
  }
docs: // AuthorizeSnapshotAccess API operation for Amazon Redshift.
  //
  // Authorizes the specified AWS customer account to restore the specified snapshot.
  //
  // For more information about working with snapshots, go to Amazon Redshift
  // Snapshots (https://docs.aws.amazon.com/redshift/latest/mgmt/working-with-snapshots.html)
  // in the Amazon Redshift Cluster Management Guide.
  //
  // Returns awserr.Error for service API and SDK errors. Use runtime type assertions
  // with awserr.Error's Code and Message methods to get detailed information about
  // the error.
  //
  // See the AWS API reference guide for Amazon Redshift's
  // API operation AuthorizeSnapshotAccess for usage and error information.
  //
  // Returned Error Codes:
  //   * ErrCodeClusterSnapshotNotFoundFault "ClusterSnapshotNotFound"
  //   The snapshot identifier does not refer to an existing cluster snapshot.
  //
  //   * ErrCodeAuthorizationAlreadyExistsFault "AuthorizationAlreadyExists"
  //   The specified CIDR block or EC2 security group is already authorized for
  //   the specified cluster security group.
  //
  //   * ErrCodeAuthorizationQuotaExceededFault "AuthorizationQuotaExceeded"
  //   The authorization quota for the cluster security group has been reached.
  //
  //   * ErrCodeDependentServiceRequestThrottlingFault "DependentServiceRequestThrottlingFault"
  //   The request cannot be completed because a dependent service is throttling
  //   requests made by Amazon Redshift on your behalf. Wait and retry the request.
  //
  //   * ErrCodeInvalidClusterSnapshotStateFault "InvalidClusterSnapshotState"
  //   The specified cluster snapshot is not in the available state, or other accounts
  //   are authorized to access the snapshot.
  //
  //   * ErrCodeLimitExceededFault "LimitExceededFault"
  //   The encryption key has exceeded its grant limit in AWS KMS.
  //
  // See also, https://docs.aws.amazon.com/goto/WebAPI/redshift-2012-12-01/AuthorizeSnapshotAccess