amazon web services - Getting error: Missing Authentication Token after AWS API request -

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i trying call lambda function through aws api gateway.

i've been getting error when tried iam authentication, api key authentication , no authentication. enter image description here

{"message":"missing authentication token"}

some people had same problem due non existing endpoint. however, i've taken endpoint directly lambda function aws console. enter image description here

i've been trying open url in browser , on postman (with , without header authentication: x-api-key: *****************). enter image description here

both responded above stated error.

one more step: in postman, need set authorization aws signature, , enter accesskey , secretkey iam user:

postman screenshot postman screenshot


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