curl --request GET \
  --url https://api.example.com/oauth/client/{handle} \
  --header 'x-api-key: <api-key>'

{
  "handle": "<string>",
  "client_id": "<string>",
  "client_secret": "<string>",
  "api_key": "<string>",
  "_auth": {
    "owner": "<string>",
    "realm": "<string>",
    "organization": "<string>",
    "domain": "<string>"
  },
  "scopes": [
    "<string>"
  ],
  "roles": [
    "<string>"
  ],
  "created": "<string>",
  "updated": "<string>"
}