Cannot change authorizer to type Request


I’ve been trying to change an authorizer type from token to request following the example shown in the docs, however, it seems that serverless is ignoring it, and the event contains type:'TOKEN'.

Mi handler code in the serverless.yml is:

  handler: project/handlers/dummy._dummy
  warmup: true
    - http:
        path: libraries/{id}/ingest
        method: post
        private: true
        authorizer: integration

The authorizer attribute points to a label in the yml called integration:

    handler: project/handlers/authorizers/aws_authorizer._integration_authorizer
    type: request
    identitySource: method.request.header.Authorization, method.request.header.WorkspaceId
    identityValidationExpression: someRegex

If I print the event inside the handler it throws something similar to:

{'type': 'TOKEN', 'methodArn': 'arn:aws:execute-api:eu-west-1:xxxxxxxxx:xxxxxxxxx/dev/POST/libraries/a982331236b5dvvb973a504665e883cef55/ingest', 'authorizationToken': 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX'}

It doesn’t matter whether I put the type attribute or not, the event is the same.

Is there something that I’m doing wrong?

Thanks in advance!