fix(moderation): added proper error handling to cog_load and db_generate_guild_join

moderation/moderation.py

@@ -22,6 +22,15 @@ class Moderation(commands.Cog):
 
     async def cog_load(self):
         """This method prepares the database schema for all of the guilds the bot is currently in."""
+        conf = await self.check_conf([
+            'mysql_address',
+            'mysql_database',
+            'mysql_user',
+            'mysql_password'
+        ])
+        if conf:
+            logging.fatal("Failed to create tables, due to MySQL connection configuration being unset.")
+            return
         guilds: list[discord.Guild] = self.bot.guilds
         for guild in guilds:
             await self.create_guild_table(guild)
@@ -29,6 +38,15 @@ class Moderation(commands.Cog):
     @commands.Cog.listener('on_guild_join')
     async def db_generate_guild_join(self, guild: discord.Guild):
         """This method prepares the database schema whenever the bot joins a guild."""
+        conf = await self.check_conf([
+            'mysql_address',
+            'mysql_database',
+            'mysql_user',
+            'mysql_password'
+        ])
+        if conf:
+            logging.fatal("Failed to create a table for %s, due to MySQL connection configuration being unset.", guild.id)
+            return
         await self.create_guild_table(guild)
 
     async def connect(self):
@@ -40,7 +58,7 @@ class Moderation(commands.Cog):
             'mysql_password'
         ])
         if conf:
-            raise LookupError
+            raise LookupError("MySQL connection details not set properly!")
         try:
             connection = mysql.connector.connect(
                 host=await self.config.mysql_address(),