The account's name, address and sign-in methods, or null
Remarks
The onboarding reads the name to seed the learner card, and the Profile
page reads all three to name the address, say how the learner signs in, and
decide whether the password and email forms apply. A page that must refuse
a visitor calls requireLearnerSession instead; this one only reports.
The signed-in learner's account identity for this request, or
nullwithout a session.