How to config a parameter with name is not camelCase?

I am trying to create a better experience for my user when he/she receives an e-mail from Supabase (auth process).

I noticed when something is wrong with the process, Supabase returns 3 parameters: unauthorized_client, error_code, and error_description.

I tried to config these names in FF parameters, but I couldn´t:


How can I do this? Is there another way?

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