Is it possible to retrieve the steam name of the player instead of the steam ID ? 

What do you mean? can you give me a little more info, like where you are getting the id and what you want to do with the name.

Shes a big plugin with lots of options to customise. So im not sure of the context you want to use the info.

Litterally explain the whole scenario with as much detail / buildup (explain to me like im an idiot :P) and I'll see what we can do.

excuse me for my english to start !!

the site I use does not allow you to vote with the STEAM ID but with a nickname so I want to have the possibility in the configuration file to read the PSEUDO STEAM instead of STEAM ID

in bold the condition that I want to modify

CONFIGURATION FILE EasyVote.json

"API Claim Reward (GET URL)": "https://my-serveurs.net/v1/votes/claim-steam?server_token={0}&steam_id={1}",
"API Vote status (GET URL)": "https://api.my-serveurs.net/v1/votes/check-steam?server_token={0}&steam_id={1}"

I hope it's understandable!

Is this the french voting site? i belive i looked at that before and there was no way of validating the votes