Support AWS_SHARED_CREDENTIALS_FILE env var

[Chris Wensel]

Allow override of the credential file location via AWS_SHARED_CREDENTIALS_FILE.

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The value is documented here: https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-envvars.html

Specifies the location of the file that the AWS CLI uses to store access keys. The default path is ~/.aws/credentials.

You can't specify this value in a named profile setting or by using a command line parameter.

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[Chris Wensel]

Closing this, likely not the issue at hand.