Determine Whether the Series Converges or Diverges $\sum _ { n = 1 } ^ { \infty } ( - 1 ) ^ { n } n \sin \left( \frac { \pi } { 9 n } \right)$

Determine whether the series converges or diverges. $\sum _ { n = 1 } ^ { \infty } ( - 1 ) ^ { n } n \sin \left( \frac { \pi } { 9 n } \right)$