Lambda Authorizer Always Returning Unauthorized

Question

I have a python lambda authorizer with the following code:

```
def lambda_handler(event, context):
    return {
        "isAuthorized": True,
        "context": {
            "exampleKey": "exampleValue",
        }
    }
```

It is connected to an API Gateway route with the following configuration: 
![Lambda Authorizer API Gateway Configuration](/media/postImages/original/IMgdvzDi3jSCWs4HOfalQNGw)

It always return {"message":"Unauthorized"} when the /dataset/classes route is used. Why doesn't it continue to the integrated function if isAuthorized is always set to true?

Answer

Can it be that you do not have an authorization header in your request? You configured the authorizer to receive that header, so if it does not exist, API Gateway will not even invoke the function and it will return an error.

Lambda Authorizer Always Returning Unauthorized

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