How to download from AWS S3 using golang

There are several ways to set credentials. For more details aws/credentials.

For example, you can specify it by setting environment variables:

AWS_ACCESS_KEY = <your_access_key>
AWS_SECRET_KEY = <your_secret_key>

Then just use credentials.NewEnvCredentials() in your config instance:

sess, _ := session.NewSession(&aws.Config{
    Region:      aws.String("us-east-1"),
    Credentials: credentials.NewEnvCredentials(),
})