Student loading into H5p.com

Wasn't sure where to find support for H5p.com but not sure why my students that are loaded into my Canvas course are not listed in h5p.com.  I have numerous assessments there but the new students for this year didn't load.  Do I need to ask IT to load them manually into the tool?  I don't have problems with the tool interfacing with Canvas - the LTI appears to working just fine.