# File lib/aws/core/credential_providers.rb, line 192
        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