The class does not provide built-in support for this API but it can be configured externally to access it.
This page explains that it uses OAuth 1.0a version:
imsglobal.org/lti/blti/bltiv1p0/lti
...
The class can be configured to access it but the documentation is confusing.
Do you need to create an application in the API site to get the OAuth consumer key and consumer secret? I did not find information where that can be done.