Hi guys, I've got an issue, I'm trying to implement my own FB authentication method (don't want to use Auth0, ty), and I've been following this: https://github.com/graphcool-examples/functions/tree/master/authentication/facebook-authentication but I'm having an issue: I cannot by any means extend the schema for this (extend type Mutation { authenticateFacebookUser(facebookToken: String!): AuthenticateFacebookUserPayload }). It simply doesn't save/update. I've tried both with the GUI and my console. When pushing the change, I get "Identical schema, no action required.". In the GUI it simply doesn't save. Did anyone else experience this, do you know if it's a bug or something?