Merge pull request #4260 from ipersids/part4/fix-link-about-auth-token

Part 4d: Fix broken link to token-based authentication source

Author: mluukkai

src/content/4/en/part4d.md

@@ -9,7 +9,7 @@ lang: en
 
 Users must be able to log into our application, and when a user is logged in, their user information must automatically be attached to any new notes they create.
 
-We will now implement support for [token-based authentication](https://www.digitalocean.com/community/tutorials/the-ins-and-outs-of-token-based-authentication#how-token-based-works) to the backend.
+We will now implement support for [token-based authentication](https://www.okta.com/identity-101/what-is-token-based-authentication/) to the backend.
 
 The principles of token-based authentication are depicted in the following sequence diagram:
 

src/content/4/es/part4d.md

@@ -9,7 +9,7 @@ lang: es
 
 Los usuarios deben poder iniciar sesión en nuestra aplicación, y cuando un usuario inicia sesión, su información de usuario debe adjuntarse automáticamente a cualquier nota nueva que cree.
 
-Ahora implementaremos soporte para [autenticación basada en token](https://www.digitalocean.com/community/tutorials/the-ins-and-outs-of-token-based-authentication#how-token-based-works) para el backend.
+Ahora implementaremos soporte para [autenticación basada en token](https://www.okta.com/identity-101/what-is-token-based-authentication/) para el backend.
 
 Los principios de la autenticación basada en tokens se describen en el siguiente diagrama de secuencia:
 

src/content/4/fi/osa4d.md

@@ -9,7 +9,7 @@ lang: fi
 
 Käyttäjien tulee pystyä kirjautumaan sovellukseemme ja muistiinpanot pitää automaattisesti liittää kirjautuneen käyttäjän tekemiksi.
 
-Toteutamme nyt backendiin tuen [token-perustaiselle](https://scotch.io/tutorials/the-ins-and-outs-of-token-based-authentication#toc-how-token-based-works) autentikoinnille.
+Toteutamme nyt backendiin tuen [token-perustaiselle](https://www.okta.com/identity-101/what-is-token-based-authentication/) autentikoinnille.
 
 Token-autentikaation periaatetta kuvaa seuraava sekvenssikaavio:
 

src/content/4/fr/part4d.md

@@ -9,7 +9,7 @@ lang: fr
 
 Les utilisateurs doivent pouvoir se connecter à notre application, et lorsque l'utilisateur est connecté, ses informations doivent automatiquement être attachées à toutes les nouvelles notes qu'ils créent.
 
-Nous allons maintenant implémenter le support de [l'authentification basée sur des jetons](https://www.digitalocean.com/community/tutorials/the-ins-and-outs-of-token-based-authentication#how-token-based-works) dans le backend.
+Nous allons maintenant implémenter le support de [l'authentification basée sur des jetons](https://www.okta.com/identity-101/what-is-token-based-authentication/) dans le backend.
 
 Les principes de l'authentification basée sur des jetons sont représentés dans le diagramme de séquence suivant :
 

src/content/4/ptbr/part4d.md

@@ -9,7 +9,7 @@ lang: ptbr
 
 Os usuários devem estar aptos a logarem na aplicação, e quando um usuário é logado, suas informações devem ser adicionadas automaticamente a qualquer nova nota que você criar.
 
-Agora nós vamos implementar no backend uma [autenticação baseada em token](https://scotch.io/tutorials/the-ins-and-outs-of-token-based-authentication#toc-how-token-based-works).
+Agora nós vamos implementar no backend uma [autenticação baseada em token](https://www.okta.com/identity-101/what-is-token-based-authentication/).
 
 Os princípios da autenticação baseada em token são apresentados no diagrama abaixo:
 

src/content/4/zh/part4d.md

@@ -10,8 +10,8 @@ lang: zh
 <!-- Users must be able to log into our application, and when a user is logged in, their user information must automatically be attached to any new notes they create.-->
  用户必须能够登录我们的应用，当用户登录后，他们的用户信息必须自动附加到他们创建的任何新笔记上。
 
-<!-- We will now implement support for [token based authentication](https://scotch.io/tutorials/the-ins-and-outs-of-token-based-authentication#toc-how-token-based-works) to the backend.-->
-我们现在将在后端实现对[基于令牌的认证](https://scotch.io/tutorials/the-ins-and-outs-of-token-based-authentication#toc-how-token-based-works)的支持。
+<!-- We will now implement support for [token based authentication](https://www.okta.com/identity-101/what-is-token-based-authentication/) to the backend.-->
+我们现在将在后端实现对[基于令牌的认证](https://www.okta.com/identity-101/what-is-token-based-authentication/)的支持。
 
 <!-- The principles of token based authentication are depicted in the following sequence diagram:-->
  基于令牌的认证的原则在下面的顺序图中得到描述。