protected SecretsManagerClient getClient(VaultName vault) {
        var awsRole = awsRole(vault);
        var externalId = externalId(vault);
        var assumedRoleInfo = new AssumedRoleInfo(awsRole, Optional.ofNullable(externalId));
        clientMap.putIfAbsent(assumedRoleInfo, clientAndCredentialsSupplier.apply(assumedRoleInfo));
        return clientMap.get(assumedRoleInfo);
    }
Returns the AWS role associated with the given vault.
jdisc-cloud-aws/src/main/java/ai/vespa/secret/aws/AsmSecretStoreBase.java