I used to be an avid gardener and a lot of stuff that I read, during that phase, about making organic fertilisers and compost mentioned using urine.
Though urine is rich in nutrients the same can be highly concentrated and that could actually damage the plants (burn them) rather than benefit them if used undiluted.
"A love affair with knowledge will never end in heartbreak" - Michael Garrett Marino
But the smell is another problem in using this for plants.
No life without Sun