Working with AWS API{Message Forbidden}

Question

I have done the following :
1.Added invoke Function "Addpermission"API with the following command.

aws lambda add-permission --function-name FunctionName --principal iot.amazonaws.com --source-arn AuthorizerARn --statement-id Id-123 --action "lambda:InvokeFunction"

2.Verify Authorizer Response with  the command
aws iot test-invoke-authorizer --authorizer-name NAME_OF_AUTHORIZER --token TOKEN_VALUE

In AWS CLI. gives the following error:
aws: error: argument operation: Invalid choice, valid choices are:

And  Postman API is still giving {message Forbidden}    :(
Note:TOKEN_VALUE is up to date

Answer

Make sure of below:

* The function name must exist in the same region you are running the command in.
* The function name is correct
* The --source-arn parameter is set to AuthorizerARn. Not sure if the typo "ARn", instead of "Arn" is affecting that. Regardless, the ARN must be correct
* The Lambda authorizer exists in your account.
* The lambda function is implemented correctly by returning a valid IAM policy (https://aws.amazon.com/blogs/compute/introducing-iam-and-lambda-authorizers-for-amazon-api-gateway-http-apis/)

Working with AWS API{Message Forbidden}

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