Get a single user by ID

curl --request GET \
  --url https://userservice-staging.withbenji.com/users/{id} \
  --header 'Authorization: Bearer <token>'

{
  "user": {
    "id": 2,
    "first_name": "<string>",
    "last_name": "<string>",
    "email": "jsmith@example.com",
    "phone_number": "<string>",
    "created_date": "2023-11-07T05:31:56Z",
    "external_id": "<string>",
    "partner_status_tiers": [
      {
        "id": 2,
        "user_id": 2,
        "partner_id": 2,
        "partner_status_tier_id": 2,
        "external_id": "<string>",
        "first_name": "<string>",
        "last_name": "<string>",
        "total_rewards": 1,
        "total_rewards_earned": 1,
        "total_rewards_redeemed": 1,
        "created_date": "2023-11-07T05:31:56Z"
      }
    ],
    "merchants": [
      {
        "id": 2,
        "user_id": 2,
        "merchant_id": 2,
        "external_id": "<string>",
        "total_rewards_earned": 1,
        "total_rewards_redeemed": 1,
        "created_date": "2023-11-07T05:31:56Z"
      }
    ]
  }
}