class AWS::Core::CredentialProviders::ENVProvider

def get_credentials
  credentials = {}
  KEYS.each do |key|
    if value = ENV["#{@prefix}_#{key.to_s.upcase}"]
      credentials[key] = value
    end
  end
  # Merge in CredentialFileProvider credentials if
  # a #{@prefix}_CREDENTIAL_FILE environment(ENV) variable is set
  if ENV["#{@prefix}_CREDENTIAL_FILE"]
    credentials.merge! CredentialFileProvider.new(ENV["#{@prefix}_CREDENTIAL_FILE"]).get_credentials
  end
  credentials
end