Public / private organisation membership

[emilyb7]

You might have found that this doesn't work for some FACN1 members because they're not "public" members of FACN1. This depends on the user settings.

From what I can see, you're only checking organisations of which the user is a public member. But with Oauth you can check all their organisations. See the github api docs:

https://developer.github.com/v3/orgs/#list-your-organizations