curl --request GET \
  --url https://discord.com/api/v10/guilds/{guild_id}/members/{user_id} \
  --header 'Authorization: <api-key>'

{
  "avatar": "<string>",
  "banner": "<string>",
  "communication_disabled_until": "2023-11-07T05:31:56Z",
  "flags": 123,
  "joined_at": "2023-11-07T05:31:56Z",
  "nick": "<string>",
  "pending": true,
  "premium_since": "2023-11-07T05:31:56Z",
  "roles": [
    "<string>"
  ],
  "user": {
    "id": "<string>",
    "username": "<string>",
    "avatar": "<string>",
    "discriminator": "<string>",
    "public_flags": 123,
    "flags": 0,
    "global_name": "<string>",
    "primary_guild": "<unknown>",
    "bot": true,
    "system": true,
    "banner": "<string>",
    "accent_color": 123,
    "avatar_decoration_data": "<unknown>",
    "collectibles": "<unknown>"
  },
  "mute": true,
  "deaf": true,
  "avatar_decoration_data": "<unknown>",
  "collectibles": "<unknown>"
}