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I am testing out this proof of concept. However, I am getting Missing Authentication Token after adding the role into the lambda function that I created to run on API gateway. I am currently following below references to invoke lambda function + dynamodb + api gateway with Java.

After giving the access with IAM role. I am still having the same error. Please help to advice. Thank you all!

https://www.youtube.com/watch?v=TbCNVApI4lA&ab_channel=MadeEasy

https://github.com/enquiresandeep/AWSSamples

screenshots

Postman GET error

AWS role attached to lambda function

AWS role solution with dynamoDB access

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  • If you are using IAM authentication, you need to add the appropriate Authorization header via AWS v4 signing process. I believe Postman can generate these for you but you need to enable those and sign the request with your role (ie add the headers). Commented Jun 12, 2021 at 3:06
  • Thanks bro for the kind guidance! I added the access and secret key from AWS and it works. Thank you so much! This is the video url i used too: youtube.com/watch?v=BNQX08KSmLY&ab_channel=BabarSiddiqui Commented Jun 23, 2021 at 15:24

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Thanks to @JD D!

Obtain IAM access and secret key and add into Postman Authorization with AWS Signature before performing the API calls.

Reference Video: https://www.youtube.com/watch?v=BNQX08KSmLY&ab_channel=BabarSiddiqui

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