Authenticate with custom OAuth example

Example.swift

import Parse
import Bolts

class AuthDelegate:NSObject, PFUserAuthenticationDelegate {
  func restoreAuthenticationWithAuthData(authData: [String : String]?) -> Bool {
    return true
  }
}

let configuration = ParseClientConfiguration { (configuration) -> Void in
  configuration.server = "http://localhost:1337/" // URL to your parse server
  configuration.applicationId = "12345" // your application ID
  configuration.clientKey = "12345" // your client key
}
Parse.enableLocalDatastore()
Parse.initializeWithConfiguration(configuration)
Parse.setLogLevel(PFLogLevel.Debug)

// Create an authenitcation delegate to validate auth data to be restored
let authDelegate = AuthDelegate()

// Register the authentication delegate
PFUser.registerAuthenticationDelegate(authDelegate, forAuthType: "twitter")

// Fill the auth data with the response of the Twitter SDK
let authData = ["auth_token":"AUTH_TOKEN",
  "auth_token_secret":"AUTH_TOKEN_SECRET",
  "id":"USER_ID",
  "screen_name":"USER_SCREEN_NAME"]

PFUser.logInWithAuthTypeInBackground("twitter", authData: authData).continueWithBlock { (task) -> AnyObject? in
  // the PFUser currentUser should not be nil at this point
  return nil
}

Hi, for android how can i implement this ???

Where can I find the corresponding key for the authData required for Spotify login? I tried to search the web but could not find any useful information about login with Spotify