Retrieve Token Eligibility

Returns the items *this* customer can charge to their HSA/FSA card, and when that stops being true. This is **customer eligibility** — a property of the person rather than the product. It is catalog eligibility narrowed to one customer: an item appears here only when they hold a verified, unexpired Letter of Medical Necessity covering its eligibility category, or when that category is pre-approved and needs no letter at all. The payment token is only how you name the customer; the provision-request form of this endpoint answers the same question for a customer who does not hold a token yet. `eligibility_status` is a statement of fact, not an instruction, and each value earns a different response from you — the per-value meanings are listed on the enum. In short: `approved` is the steady state; `expired` is your renewal trigger, while every item keeps charging to the backup card meanwhile; `never_requested` calls for a first-time qualification prompt rather than a renewal one; `rejected` means suppress the prompt rather than sending the customer round again, since we have already emailed them the outcome; and `pending` means wait. `pending` is rare on this form, because a payment token is normally minted only once a letter has been decided. It appears when a customer who is not currently covered has a survey under review — a requalification in flight, most often. An empty `items` list under `approved` is worth reporting to us rather than to your customer: it means a live qualification exists but nothing in your catalog is eligible under it any more, which a re-survey cannot fix. Read it on whatever schedule suits you; the answer is stable until `lmn_expires_at`.