curl --request PATCH \
  --url https://api.mixpeek.com/v1/apps/{app_id}/users/{user_id}/role \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "role": "<string>"
}
'

{
  "user_id": "<string>",
  "membership_id": "<string>",
  "role": "<string>",
  "email": "<string>",
  "name": "<string>",
  "avatar_url": "<string>",
  "joined_at": "<string>"
}