Custom message for Authorizer with statusCode 403 - Serverless Framework

Question

I would like that when an authorizer denies access a more specific message instead of the default "User is not authorized to access this resource", I tried several ways to achieve that, the way that seems more feasible is this one https://stackoverflow.com/a/49806967 , but I didn't succeed in customizing the message, my authorizer already performs the main function of authorizing.

Has anyone here succeeded in customizing the authorizer message in any way?

here follows the serverless.yml example

service: serasa-score-backend

plugins:
  - serverless-offline
  - serverless-apigateway-plugin
  - serverless-plugin-typescript
  - serverless-stack-output

package:
  patterns:
    - 'src/config/serviceAccountKey.json'

provider:
  name: aws
  runtime: nodejs16.x
  stage: 'local'
  region: us-east-2

custom:
  stage: 'local'
  output:
    file: .serverless/output.json

functions:
  verify-token:
    handler: src/functions/auth/controller.checkJwt
  healthcheck:
    handler: src/functions/healthcheck/controller.check
    description: Healthcheck to ensure the service is up
    events:
      - http:
          path: healthcheck
          method: get
  registerUser:
    handler: src/functions/user/controller.register
    description: Healthcheck to ensure the service is up
    timeout: 30
    events:
      - http:
          path: users
          method: post
          authorizer:
            name: verify-token
            resultTtlInSeconds: 30
            identitySource: method.request.header.Authorization
            type: token
  login:
    handler: src/functions/auth/controller.login
    description: Healthcheck to ensure the service is up
    timeout: 30
    events:
      - http:
          path: auth
          method: post
          authorizer:
            name: verify-token
            resultTtlInSeconds: 30
            identitySource: method.request.header.Authorization
            type: TOKEN
            enableSimpleResponses: false

export const checkJwt: APIGatewayTokenAuthorizerHandler = async (
    event,
    context,
) => {
    context.callbackWaitsForEmptyEventLoop = false
    console.log(event.authorizationToken)
    const result = generatePolicy('user', 'Deny', event.methodArn)
    console.log(result)
    return result
}

export function generatePolicy(
    principalId: string,
    effect: 'Allow' | 'Deny',
    resource: string
) {
    const authResponse: any = {}

    authResponse.principalId = principalId

    if (effect && resource) {
        const policyDocument: any = {}
        policyDocument.Version = '2012-10-17'
        policyDocument.Statement = []

        const statementOne: any = {}
        statementOne.Action = 'execute-api:Invoke'
        statementOne.Effect = effect
        statementOne.Resource = resource
        policyDocument.Statement[0] = statementOne

        authResponse.policyDocument = policyDocument
    }

    authResponse.context = {}

    // Set a custom message for unauthorized requests
    if (effect === 'Deny') {
        authResponse.context.message =
            'Sorry, you are not authorized to access this resource. Try later'
    }

    return authResponse
}