♻️(email) use full name instead of email

If the full name is available,
we will use it to identify the user in the email
instead of the email address.

src/backend/core/api/viewsets.py

@@ -576,8 +576,12 @@ class DocumentAccessViewSet(
         """Add a new access to the document and send an email to the new added user."""
         access = serializer.save()
         language = self.request.headers.get("Content-Language", "en-us")
+
         access.document.email_invitation(
-            language, access.user.email, access.role, self.request.user.email
+            language,
+            access.user.email,
+            access.role,
+            self.request.user,
         )
 
 
@@ -778,6 +782,7 @@ class InvitationViewset(
         invitation = serializer.save()
 
         language = self.request.headers.get("Content-Language", "en-us")
+
         invitation.document.email_invitation(
-            language, invitation.email, invitation.role, self.request.user.email
+            language, invitation.email, invitation.role, self.request.user
         )