java.lang.IllegalArgumentException: one of either dataSource or dataSourceClassName must be specified

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java.lang.IllegalArgumentException: one of either dataSource or dataSourceClassName must be specified
at com.zaxxer.hikari.AbstractHikariConfig.validate(AbstractHikariConfig.java:747)
at com.zaxxer.hikari.HikariDataSource.(HikariDataSource.java:73)

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