cms: update Contribute page "enrich-an-individual-item"

src/pages/contribute/enrich-an-individual-item.page.mdx

@@ -13,9 +13,25 @@ If you find an existing Marketplace entry that you wish to enhance or correct, y
 
 First, you need to sign in to the SSH Open Marketplace which should be possible very conveniently using already existing credentials (academic or social accounts are available). 
 
-![](/assets/cms/images/signin1.png)
+![Sign in the SSH Open Marketplace steps 1 and 2](/assets/cms/images/sign-in-mai-1-2.png)
 
-![](/assets/cms/images/signin2.png)
+![Sign in the SSH Open Marketplace step 3](/assets/cms/images/sign-in-mai-3.png)
+
+**If it is your first log in** to the Marketplace, you will have to undergo several validation steps before being logged in. This is normal. 
+
+You need to accept the Usage Policies, as shown in the two screens below:
+
+![screenshot of myaccessID - 1](/assets/cms/images/myaccess_1.png "Joining the SSHOC Marketplace group on MyAccessID")
+
+![screenshot of myaccessID - 2](/assets/cms/images/myaccess_2.png "Approving the terms of use")
+
+Your account is now successfully connected to the Marketplace, and you can go back to the [sign in page of the SSH Open Marketplace](https://marketplace.sshopencloud.eu/auth/sign-in).
+
+![screenshot of myaccessID - 3](/assets/cms/images/myaccess_3.png "Successful membership to MyAccessID")
+
+
+
+If you encounter any problem with logging in, or do not find your history of contributed items in your account, please get in touch with the team using the \[contact form](/contact) or directly via [[email protected]]([email protected]).
 
 2. ## **Go to the item you wish to correct**
 3. ## **Edit the entry**