old_contents: import aiomysql
  
  from .. import config
  from ..event import bus
  from .migration import MigrationManager
  
  host = config.create("storage", "host", fallback="localhost", comment="The database server host")
  port = config.create("storage", "port", type=int, fallback=3306, comment="The database server port")
  user = config.create("storage", "user", fallback="plumeria", comment="The database server username")
  password = config.create("storage", "password", fallback="", comment="The database server password")
  db = config.create("storage", "db", fallback="plumeria", comment="The database name")
  
  
  class Pool:
      def __init__(self):
          self.pool = None
  
      def acquire(self):
          return self.pool.acquire()
  
  
  pool = Pool()
  migrations = MigrationManager(pool)
  
  
  @bus.event('preinit')
  async def preinit():
      pool.pool = await aiomysql.create_pool(host=host(), port=port(), user=user(), password=password(), db=db(), autocommit=True)
      await migrations.setup()
  
new_contents: import aiomysql
  
  from .. import config
  from ..event import bus
  from .migration import MigrationManager
  
  host = config.create("storage", "host", fallback="localhost", comment="The database server host")
  port = config.create("storage", "port", type=int, fallback=3306, comment="The database server port")
  user = config.create("storage", "user", fallback="plumeria", comment="The database server username")
  password = config.create("storage", "password", fallback="", comment="The database server password")
  db = config.create("storage", "db", fallback="plumeria", comment="The database name")
  
  
  class Pool:
      def __init__(self):
          self.pool = None
  
      def acquire(self):
          return self.pool.acquire()
  
  
  pool = Pool()
  migrations = MigrationManager(pool)
  
  
  @bus.event('preinit')
  async def preinit():
      pool.pool = await aiomysql.create_pool(host=host(), port=port(), user=user(), password=password(), db=db(),
                                             autocommit=True, charset='utf8mb4')
      await migrations.setup()
  
subject: Make sure to set MySQL charset.