code: function (credits) {
              if (credits.enabled && !this.credits) {
                  this.credits = this.renderer.text(
                    credits.text,
                    0,
                    0
                    )
                    .on('click', function () {
                        if (credits.href) {
                            location.href = credits.href;
                        }
                    })
                    .attr({
                        align: credits.position.align,
                        zIndex: 8
                    })
                    .css(credits.style)
                    .add()
                    .align(credits.position);
              }
          }
docs: Show chart credits based on config options