Updating aws config/credentials

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// Here, aws comes from installing awscli.

# aws configure --profile=<your_profile_name>

This will update the files at ~/.aws/config   and ~/.aws/credentials 

You can inspect the contents of the above files to verify.
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You can simply run below to set credentials

# export AWS_PROFILE=<your_profile_name>

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Verify above configuration using 

# aws iam get-user

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