Database data and player data are the same but comparison fails?

Hi, im trying to make a plugin like AuthMe for 1.14.4 and im really confused. I have MySQL database and im sending query to get the uuid of a player recorded in the database but when it compares it to the one that player.getUniqueId() gives you for some reason the if statement fails even tho they are the same ?

Sorry if i confused you, this is actually my first time working with databases. And sorry if the formatting or the thread is wrong, im also new to bukkit, and bukkit forum

Code:

https://pastebin.com/7KLyZyVF





The code is messy because i was testing and getting frustrated and i was trying things.

For now i only want to get the database and server data to compare like it should. I know there needs to be more things.


EDIT:

I solved it by changing if (rs.getString("user_name") == event.getPlayer().getName()) to
if (rs.getString("user_name").contentEquals(event.getPlayer().getName()))
I thing the old one was not working because the String structure was different in the slightest bit.