User model for Blog API

User.swift

import FluentMySQL
import Vapor

final class User: MySQLModel {  // 1
    /// The unique identifier for `User`  // 2
    var id: Int?

  // Additional properties of `User`  // 3
    var email: String
    var password: String
    var nickname: String?
    
    /// Creates a new `User`. //4
    init(id: Int? = nil, nickname: String? = nil, email: String, password: String) {
        self.id = id
        self.email = email
        self.nickname = nickname
        self.password = password
    }
}

extension User: Migration { } // 5

extension User: Content { } // 6

extension User: Parameter { } // 7