docs: def make_mysql_url(username: str, password: str, dbname: str,
                     driver: str = "mysqldb", host: str = "localhost",
                     port: int = 3306, charset: str = "utf8") -> str:
      """
      Makes an SQLAlchemy URL for a MySQL database.
      """
      return "mysql+{driver}://{u}:{p}@{host}:{port}/{db}?charset={cs}".format(
          driver=driver,
          host=host,
          port=port,
          db=dbname,
          u=username,
          p=password,
          cs=charset,
      )