How to invoke signed urls token lambda without api?

[kervonryan]

Note: If your question is regarding the AWS Amplify Console service, please log it in the
official AWS Amplify Console forum

** Which Category is your question related to? **
Signed Url Token

** What AWS Services are you utilizing? **
Lambda

** Provide additional details e.g. code snippets **

How do i invoke the signed urls lambda function via HTTP while respecting the env(dev, stage, prod)?
I've tried adding a apigateway trigger with the necessary permissions but I get error 500. Can someone guide me on how to do this and the steps to do this be added to the documentation given that we have the option to turn off the API. Thanks.

EDIT: It works with the api gateway trigger! Still, is there a better way to do this in the cli?

[kervonryan]

@wizage