public String getCredentialArn() {
        return this.credentialArn;
    }
<p>
The Amazon Resource Name (ARN) of the Amazon Web Services Secrets Manager secret that identifies the credentials
to authenticate to the upstream registry.
</p>

@return The Amazon Resource Name (ARN) of the Amazon Web Services Secrets Manager secret that identifies the
        credentials to authenticate to the upstream registry.
aws-java-sdk-ecr/src/main/java/com/amazonaws/services/ecr/model/UpdatePullThroughCacheRuleRequest.java