print free space for mount

I am trying to print the free space for a mount that an application needs to have x free on. Once i can do that i would look at adding actions based on that, but i would also like to the user running the play to know if there is an issue or not.

Here is what i have so far, and i cant see to get what i would expect, any thoughts:

code:

Then you would need to write you own callback plugin or try the included ones to see if have output you like
https://docs.ansible.com/ansible/latest/plugins/callback.html