Pagination duplicates problem

.swift

class Pagination: Decodable {
    
    var pets: [Pet]
    var currentPage: Int
    var totalPages: Int
    
    enum ResultCodingKeys: String, CodingKey {
        case pets, currentPage, totalPages
    }
    
    required init(from decoder: Decoder) throws {
        let objectsContainer = try decoder.container(keyedBy: ResultCodingKeys.self)
        currentPage = try objectsContainer.decode(Int.self, forKey: .currentPage)
        totalPages = try objectsContainer.decode(Int.self, forKey: .totalPages)
        pets = try objectsContainer.decode([Pet].self, forKey: .pets)
    }
    
}


class Pagination: Decodable {
    
    var users: [User]
    var currentPage: Int
    var totalPages: Int
    
    enum ResultCodingKeys: String, CodingKey {
        case users, currentPage, totalPages
    }
    
    required init(from decoder: Decoder) throws {
        let objectsContainer = try decoder.container(keyedBy: ResultCodingKeys.self)
        currentPage = try objectsContainer.decode(Int.self, forKey: .currentPage)
        totalPages = try objectsContainer.decode(Int.self, forKey: .totalPages)
        users = try objectsContainer.decode([User].self, forKey: .users)
    }
    
}


class Pagination: Decodable {
    
    var vets: [Vet]
    var currentPage: Int
    var totalPages: Int
    
    enum ResultCodingKeys: String, CodingKey {
        case vets, currentPage, totalPages
    }
    
    required init(from decoder: Decoder) throws {
        let objectsContainer = try decoder.container(keyedBy: ResultCodingKeys.self)
        currentPage = try objectsContainer.decode(Int.self, forKey: .currentPage)
        totalPages = try objectsContainer.decode(Int.self, forKey: .totalPages)
        vets = try objectsContainer.decode([Vet].self, forKey: .vets)
    }
    
}