The on-premises installation of the Enterprise version of the Veracity Learning LRS includes a system-level API for creating an LRS, adding users, and more.
To open the System API Keys page, in the upper-right, click the User button (your account name) to expand the context menu, then select the Admin option. On the Admin page, in the Admin Tools section, click Manage System API Keys.
System API Documentation
While the terminology is similar, don't confuse the System API with the LRS-level API. The System API is for managing the entire installation, not an individual LRS.