Resource leak: CSVReader and FileReader never closed in UserDatabaseHandler.readFileCsv

[PDGGK]

CSVReader wrapping FileReader at line 233 in readFileCsv() is never closed. Compare with readFileExcel() in the same class (line 267) which correctly uses try-with-resources. Fix: wrap in try-with-resources.

[PDGGK]

Working on this.