Fix Error Handling to output JSON#4

Open

tjp2021 wants to merge 8 commits intomasterfrom

acme-api-fix-json

Commits on Sep 7, 2018

Swap out puts error messages for render json responsej
Timothy Joo
committed

Commits on Jan 23, 2019

Place pricing validation in Subscription class instead of fakepayservice for separation of concerns
tjp2021
committed