Importing subscribers from OneSignal

[ivptr]

Please add instructions and code to import existing subscribers from OneSignal.

Ref: https://docs.altcraft.com/display/UD/Migration+from+OneSignal https://stackoverflow.com/a/54792650/5204858 https://github.com/ruchit47/onesignal-user-transfer/blob/master/OneSignalTransfer.js https://docs.wonderpush.com/docs/migrate-your-ios-app-from-onesignal-to-wonderpush#importing-your-subscribers-into-wonderpush

[rwngallego]

Hi, in Perfecty Push is possible to do all the import as you have total control over the data. You can use the exported VAPID Keys from OneSignal here (https://docs.perfecty.org/wp/configuration/#6-self-hosted-server), and the subscribers data can be imported into Perfecty's DB users table using a SQL utility (phpmyadmin or Mysql Workbench).

Right now we have a shortage of time to create detailed instructions but we would really appreciate if someone from the community provides an example as a PR here: https://github.com/perfectyorg/perfecty-push-docs/tree/master/docs/wp