Get User

{
  "id": "uuid",
  "username": "johndoe",
  "firstName": "John",
  "surname": "Doe",
  "location": "New York, USA",
  "bio": "Fujifilm enthusiast",
  "instagramHandle": "johndoe_photo",
  "avatarUrl": "https://storage.supabase.co/...",
  "coverPhotoUrl": "https://storage.supabase.co/...",
  "createdAt": "2024-01-15T10:30:00Z",
  "stats": {
    "followerCount": 150,
    "followingCount": 75,
    "recipeCount": 25,
    "postCount": 40,
    "collectionCount": 5
  },
  "isFollowing": false
}