Gettin the pfx for an app to use in Mailgun and parse server

问题

I'm trying to use mailgun to send verification emails and recover passwords from Parse Server (working on AWS) and it's been a real pain since I don't know anything about node.js. I'm using this adapter and following this post but I'm having problems to fill this info:

push: {
    ios: [
      {
        pfx: 'FILE.p12', // Dev PFX or P12
        bundleId: 'BUNDLE',
        production: false // Dev
      },
      {
        pfx: 'FILE.p12', // Prod PFX or P12
        bundleId: 'BUNDLE',  
        production: true // Prod
      }
    ]
  },

I understand that the pfx is a keychain file but I don't understand how to find the one I'm using for my app, and I guess Dev is the developer and Prod is my specific app, so is it the file that I get when I try to upload to the app store or what file?, also de bundeID I understand that is the com.name.appname, but it asks for two, so what is the other one? A little help wpould be much appreciated, I've been trying to set this up for the past 3 days and can't find a way to do it. Thanks!

来源：https://stackoverflow.com/questions/47973233/gettin-the-pfx-for-an-app-to-use-in-mailgun-and-parse-server