Custom error message doesn't reach the front end

[FlandersBurger]

• Version: Devise Token Auth 1.2.0 and J-Toker 0.0.10-beta3
• Custom Overrides: what have you done in terms of [custom controller overrides]
• Custom Frontend: jToker

I'm trying to send a custom message to the front end but data always comes up empty. This code kicks in when a user tries to login with a oauth provider other than the one they originally logged in with (unique email conflict)

data is empty even though I provided an error with authFailure as per the documents (i have confirmed it is actually executing the "render_data_or_redirect")