feat: Implement saml auth providers API endpoint

packages/backend/src/controllers/api/v1/admin/saml-auth-providers/get-saml-auth-provider.ee.js

@@ -6,5 +6,7 @@ export default async (request, response) => {
     .findById(request.params.samlAuthProviderId)
     .throwIfNotFound();
 
-  renderObject(response, samlAuthProvider);
+  renderObject(response, samlAuthProvider, {
+    serializer: 'AdminSamlAuthProvider',
+  });
 };

packages/backend/src/controllers/api/v1/admin/saml-auth-providers/get-saml-auth-providers.ee.js

@@ -7,5 +7,7 @@ export default async (request, response) => {
     'desc'
   );
 
-  renderObject(response, samlAuthProviders);
+  renderObject(response, samlAuthProviders, {
+    serializer: 'AdminSamlAuthProvider',
+  });
 };