thoughtfulSaying, "I won a Hugo Award" is not something that any one AO3 contributor should legitimately say for their individual and personal contribution to AO3. Anyone doing so is implicitly denying the agency of every other contributor, whether they intend to do so or not.
Saying "We won a Hugo Award!" is appropriate. In my opinion, it's just as legitimate as the fans of a sports franchise saying, when their team wins the championship, "We won!" In fact, it's more appropriate, given the "ownership" of the individual AO3 contributors in the combined entity and joint authorship of the work that WSFS honored.