1) The problem → I'm unable to pull the date a membership has been upgraded or downgraded from the Front-end API
2) Why is this important → We produce content on a regular basis. We only want users to have access to the content for which they have subscribed (and not the period during which they were not a paying user). If a user starts subscribing from Jan 2020, I want them to access content from Jan 2020, not content that dates back to 2017 for example
3) What's your plan B → There's a workaround, I can pull membership.current_period_end and minus the length of the membership to get the original date. This workaround only works if I don't need the membership date upgraded/downgraded as the membership.current_period_end will change as the membership is renewed.
4) Possible solutions we could build for you → Adding the date a membership has been upgraded as a field to the Front-End API.