Read AWS Credentials from ~/.aws/credentials file

[lewis262626]

Currently you have to supply your AWS access key and secret key when setting up Algo. A better, and more user friendly solution would be to read from the AWS credentials file.

Describe the solution you'd like Algo should read from the AWS credentials file

Describe alternatives you've considered None

Additional context None

Thoughts welcome

[tonymet]

Another option is using the current EC2 instance role credentials -- that way no key & secret are needed.