Update guild listener command to new data classes.

cogs/guild_listener/__init__.py

@@ -17,7 +17,7 @@ class GuildListener(commands.Cog, name="Guild Listener"):
     @commands.Cog.listener()
     async def on_guild_join(self, guild: nextcord.Guild):
         """Listener for Guild Join. Creates skeleton for new guild joined and saves it."""
-        highscores_data.add_new_server(guild.id)
+        highscores_data.add_guild(guild.id)
 
         welcome_message: str = "Hello, I keep track of Highscores for you!"
         welcome_message += " Currently only supporting RuneScape boss highscores,"
@@ -30,7 +30,7 @@ class GuildListener(commands.Cog, name="Guild Listener"):
     async def on_guild_remove(self, guild: nextcord.Guild):
         """Listener for Guild Remove. Removes data from highscores_data."""
         print(f"Removing data for guild {guild.name} (id {guild.id}).")
-        highscores_data.remove_guild(guild.id, guild.name)
+        highscores_data.remove_guild(guild.id)
 
 
 # This function will be called when this extension is loaded.