/api/v1/integration: filter config param if in response_metadata (#1570)

This endpoint is used by the webapp to display provider info when
creating a new connection. When some connection config param is
populated via the token response or redirect metadata we don't need
to show a field for the user to fill in.

packages/server/lib/controllers/config.controller.ts

@@ -55,7 +55,10 @@ class ConfigController {
                     creationDate: config.created_at
                 };
                 if (template && template.auth_mode !== AuthModes.App && template.auth_mode !== AuthModes.Custom) {
-                    integration['connectionConfigParams'] = parseConnectionConfigParamsFromTemplate(template!);
+                    integration['connectionConfigParams'] = parseConnectionConfigParamsFromTemplate(template!).filter(
+                        // we ignore connection config params that are in the token response metadata or redirect url metadata
+                        (element) => [...(template.token_response_metadata || []), ...(template.redirect_uri_metadata || [])].indexOf(element) == -1
+                    );
                 }
                 return integration;
             });