Custom lambda authorizer auth token customize

Hello,
I’m trying to implement a custom lambda authorizer, and I want setting auth token ‘AAA-authorization’ not ‘Authorization’. But deployed Authorizer’s Token Source is ‘Authorization’.
How can I set Token Source by serverless framework. Please help me.

This might help you: https://www.freecodecamp.org/news/a-crash-course-on-securing-serverless-apis-with-json-web-tokens-ff657ab2f5a5/