This plugin gets, sets and removes key,value pairs from a device's secure storage.
Requires Cordova plugin: `cordova-plugin-secure-storage-echo`. For more info, please see the [Cordova Secure Storage docs](https://github.com/mibrito707/cordova-plugin-secure-storage-echo).
The browser platform is supported as a mock only. Key/values are stored unencrypted in localStorage.