Sponsor: assign

[aclaire-thd]

Proposal to add assign sponsor to to the site.

Feature Name Assign sponsor

Functionality Assign sponsor to fulfill wish View list of available sponsors Also reassign

This includes creating the API

Should be able to assign a sponsor from the wish curation list (add sponsor link)

Notes This issue only covers assign sponsor.

There are several parts to sponsor management: add update, assign/reassign/view list, view detail