When configuring the plugin on "Configure System", the username and password are typed directly in a field - see attached screen shot.

When saving, the user/password to access InfluxDB are saved in jenkinsci.plugins.influxdb.InfluxDbPublisher.xml unencrypted.

This plugin should make use of Jenkins credentials, and have a dropbox here to select the correct username/password credentials.

This is a security issue in my opinion and needs to be fixed ASAP.
Thanks.