Get current OAuth2 user

curl --request GET \
  --url https://api.fluxer.app/v1/oauth2/@me \
  --header 'Authorization: Bearer <token>'

{
  "application": {
    "id": "<string>",
    "name": "<string>",
    "icon": "<string>",
    "description": "<string>",
    "bot_public": true,
    "bot_require_code_grant": true,
    "flags": 1073741823
  },
  "scopes": [
    "<string>"
  ],
  "expires": "<string>"
}