curl --request GET \
  --url https://api.anchorbrowser.io/v1/identities/{identityId}/credentials \
  --header 'anchor-api-key: <api-key>'

{
  "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "name": "<string>",
  "source": "<string>",
  "credentials": [
    {
      "type": "username_password",
      "username": "<string>",
      "password": "<string>"
    }
  ]
}