add link to Partner account and developer sandbox

Author: meganelepalud-akeneo

content/apps/apps-getting-started.md

@@ -98,7 +98,7 @@ Feel free to contribute with languages we're not experts at.
 :::
 
 ### Requirements
-- You have a Partner account and a developer sandbox
+- You have a [Partner account](https://www.akeneo.com/technology-partners/) and a developer sandbox [contact us](https://www.akeneo.com/contact/)
 - You understand [what's an Akeneo App](/apps/apps-getting-started.html#whats-an-akeneo-app) and [how they fit into Akeneo PXM Studio](/apps/apps-getting-started.html#how-apps-fit-into-akeneo-pxm-studio)
 
 ### Step 1: Expose your activation and callback URLs

content/apps/authentication-and-authorization.md

@@ -51,8 +51,8 @@ After you've completed this tutorial, you'll be able to authorize an app created
 
 ### Requirements
 
-- You have a Partner account and a developer sandbox.
-- You're familiar with the [OAuth 2.0 flow](/apps/authentication-and-authorization.html#oauth-20) in Akeneo.
+- You have a [Partner account](https://www.akeneo.com/technology-partners/) and a developer sandbox [contact us](https://www.akeneo.com/contact/).
+- You're familiar with the [OAuth 2.0 flow](/apps/authentication-and-authorization.html#oauth-20) in Akeneo
 
 ### Step 1: Generate API credentials
 
@@ -253,7 +253,7 @@ After you've completed this tutorial, you'll be able to authenticate users comin
 
 ### Requirements
 
-- You have a Partner account and a developer sandbox.
+- You have a [Partner account](https://www.akeneo.com/technology-partners/) and a developer sandbox [contact us](https://www.akeneo.com/contact/).
 - You're familiar with [OpenID connect](https://openid.net/connect/)
 - You're familiar with the [app authentication process](/apps/authentication-and-authorization.html#getting-started-with-oauth-20)
 

content/apps/catalogs.md

@@ -46,7 +46,7 @@ After completing this tutorial, you'll be able to create and use catalogs to ret
 
 ### Requirements
 
-- You have a Partner account and a developer sandbox.
+- You have a [Partner account](https://www.akeneo.com/technology-partners/) and a developer sandbox [contact us](https://www.akeneo.com/contact/).
 - Your app already manages the authorization process.
 
 ### Step 1: Ask for catalog scopes