curl --request PATCH \
  --url {schemes}://api.upsun.com/projects/{project_id}/user-access/{user_id} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "permissions": [
    "admin"
  ]
}
'

{
  "error": "<string>"
}