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Generating a AWS API request header
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We're trying to download files from AWS, but are struggling to create the correct authorization headers. We have the requests working in Postman as that has the option to generate the AWS signature for the authorization header. 

However, we've so far been unable to get our expressions right to replicate this behaviour in Betty Blocks; We've tried based on the following samples (and additional AWS documentation) https://docs.aws.amazon.com/Am... 

Has anyone been able to implement this correctly?, and how would we go about this? I can't exactly go through all the steps we've tried as there are a lot of expressions involved, and different encoding steps e.g. 


We're trying to download files from AWS, but are struggling to create the correct authorization headers. We have the requests working in Postman as that has the option to generate the AWS signature for the authorization header. 

However, we've so far been unable to get our expressions right to replicate this behaviour in Betty Blocks; We've tried based on the following samples (and additional AWS documentation) https://docs.aws.amazon.com/Am... 

Has anyone been able to implement this correctly?, and how would we go about this? I can't exactly go through all the steps we've tried as there are a lot of expressions involved, and different encoding steps e.g. 

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