License and certification-item catalogue-certification template-item Code not found in any REST API

Summary:

Team,

we are looking the item CODE rest API for certification.
Navigation: my client group--> profiles-->item catalogue-->certification template-->click on certification name--> certification details page, Item CODE field.

We need ITEM CODE field from REST API, but we are not able to find the API, need your help.

We have tried with the API but this API does not have item code:

/hcmRestApi/resources/11.13.18.05/contentItemsLov?q=ContentTypeName='Certification'

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):