jasync-sql MySQL extra connection parameters

Question

How do I include extra information in the connection url? I looked at the code and it seems that anything after the ? will get thrown out.

val connection = MySQLConnectionBuilder.createConnectionPool(
     "jdbc:mysql://$host:$port/$database" +
     "?user=$username" +
     "&password=$password" +
     "&zeroDateTimeBehavior=CONVERT_TO_NULL" +
     "&sessionVariables=wait_timeout=1800000"
)

Where does my zeroDateTimeBehavior and sessionVariables go? Is there some other place to put it? It's not in the builder or any of the config classes/interfaces.

Thanks.