Prefer `success_Json` over custom success JSON payload.

app/controllers/session_controller.rb

@@ -261,7 +261,7 @@ class SessionController < ApplicationController
       Jobs.enqueue(:critical_user_email, type: :forgot_password, user_id: user.id, email_token: email_token.token)
     end
 
-    json = { result: "ok" }
+    json = success_json
     unless SiteSetting.hide_email_address_taken
       json[:user_found] = user_presence
     end

app/controllers/users_controller.rb

@@ -609,7 +609,7 @@ class UsersController < ApplicationController
       end
     end
 
-    json = { result: "ok" }
+    json = success_json
     json[:user_found] = user_presence unless SiteSetting.hide_email_address_taken
     render json: json
   rescue RateLimiter::LimitExceeded