# categorical moderator - ordinal iv and ordinal dv

I have found a significant positive correlation between 2 ordinal variables collected from likert scale data (Creativity at work and Engagement at work). I used the non parametric Spearmans rho test to calculate this.

I now need to see if this correlation is moderated by generation. Generation is therefore a categorical moderator with 2 levels (Millenial's/non millenial's).

What test should I use to see if there is a significant difference in the correlation between creativity and engagement for Millenials Vs Non Millenials?