Migrate to the latest Firebase SDK for Swift (v4.0.0)

FIRAnalytics.logEvent(withName: "com.myapp.appStart", parameters: nil)

Analytics.logEvent("com.myapp.appStart", parameters: nil)

FIRAnalytics.setUserPropertyString("mechanic", forName: "job")

Analytics.setUserProperty("mechanic", forName: "job")

let auth = FIRAuth(app: myApp)

let auth = Auth.auth(app: myApp)

 user 
 . 
 updateEmail 
 ( 
 "firebase_rox42@gmail.com" 
 ) 
  
 { 
  
 error 
  
 in 
  
 // 
  
 Check 
  
 for 
  
 error 
 } 

 user 
 . 
 updateEmail 
 ( 
 to 
 : 
  
 "firebase_rox42@gmail.com" 
 ) 
  
 { 
  
 error 
  
 in 
  
 // 
  
 Check 
  
 for 
  
 error 
 } 

user.updatePassword("hunter2") { error in
  // Check for error
}

user.updatePassword(to: "hunter2") { error in
  // Check for error
}

let request = user.profileChangeRequest()

let request = user.createProfileChangeRequest()

user.getTokenWithCompletion() { token, error in
  // Handle token or error here
}

user.getToken() { token, error in
  // Handle token or error here
}

FIRApp.configure(withName: "myCustomApp", options: customOptions)

FirebaseApp.configure(name: "myCustomApp", options: customOptions)

let app = FIRApp(named: "myCustomApp")

let app = FirebaseApp.app(name: "myCustomApp")

for app in FIRApp.allApps() {
  print("App name: \(app.name)")
}

for app in FirebaseApp.allApps {
  print("App name: \(app.name)")
}

FIRInstanceID.instanceID().get { identity, error in
 // Check identity and error
}

instanceID.instanceID().getID { identity, error in
  // Check identity and error
}

FIRInstanceID.instanceID().delete { error in
  // Check error
}

instanceID.instanceID().deleteID { error in
  // Check error
}