add password update option

FirebaseAuth/Tests/SampleSwift/AuthenticationExample/Models/UserActions.swift

@@ -24,4 +24,5 @@ enum UserAction: String {
   case updateDisplayName = "Display Name"
   case updatePhoneNumber = "Phone Number"
   case refreshUserInfo = "Refresh User Info"
+  case updatePassword = "Update Password"
 }

FirebaseAuth/Tests/SampleSwift/AuthenticationExample/Utility/Extensions.swift

@@ -52,6 +52,7 @@ extension User: DataSourceProvidable {
       Item(title: UserAction.signOut.rawValue, textColor: .systemBlue),
       Item(title: UserAction.link.rawValue, textColor: .systemBlue, hasNestedContent: true),
       Item(title: UserAction.requestVerifyEmail.rawValue, textColor: .systemBlue),
+      Item(title: UserAction.updatePassword.rawValue, textColor: .systemBlue),
       Item(title: UserAction.tokenRefresh.rawValue, textColor: .systemBlue),
       Item(title: UserAction.delete.rawValue, textColor: .systemRed),
     ]

FirebaseAuth/Tests/SampleSwift/AuthenticationExample/ViewControllers/UserViewController.swift

@@ -92,6 +92,9 @@ class UserViewController: UIViewController, DataSourceProviderDelegate {
     case .updateEmail:
       presentEditUserInfoController(for: actionName, to: updateUserEmail)
 
+    case .updatePassword:
+      presentEditUserInfoController(for: actionName, to: updatePassword)
+
     case .updateDisplayName:
       presentEditUserInfoController(for: actionName, to: updateUserDisplayName)
 
@@ -165,6 +168,19 @@ class UserViewController: UIViewController, DataSourceProviderDelegate {
     })
   }
 
+  public func updatePassword(to newPassword: String) {
+    user?.updatePassword(to: newPassword, completion: {
+      error in
+      if let error = error {
+        print("Update password failed. \(error)", error)
+        return
+      } else {
+        print("Password updated!")
+      }
+      self.updateUI()
+    })
+  }
+
   public func updatePhotoURL(to newPhotoURL: String) {
     guard let newPhotoURL = URL(string: newPhotoURL) else {
       print("Could not create new photo URL!")