[native] fix CommServicesAuthMetadata type

Summary:
Looking at this line you can se that the field has a different name.

Depends on D10368

Test Plan: Call this method and check if the returned object aligns with the defined type.

Reviewers: varun

Reviewed By: varun

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D10369