class Aws::CredentialProviderChain

def providers
  [
    [:static_credentials, {}],
    [:env_credentials, { prefix: 'AWS' }],
    [:env_credentials, { prefix: 'AMAZON' }],
    [:env_credentials, { key:'AWS_ACCESS_KEY', secret:'AWS_SECRET_KEY' }],
    [:shared_credentials, {}],
    [:instance_profile_credentials, {}],
  ]
end