Scope private data with wrong account

Number of APIs: 2

1. ✅ 1. Add relationship - Item from online acc. POST https://www.arcgis.com/sharing/rest/content/users/{{username}}/addRelationship

2. 🚫 2. Update scope - Item from online acc. POST https://www.arcgis.com/sharing/rest/oauth2/apps/{{client_id}}/update