Added user model

app/models/user.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+class User < ApplicationRecord
+  has_secure_password
+
+  validates :username,
+            :first_name,
+            :last_names,
+            :email,
+            presence: true
+
+  validates :email,
+            :username,
+            uniqueness: { case_sensitive: false }
+
+  validates :email,
+            format: { with: /\A.*@.*\..*\z/ } # Only very basic regex
+
+  validates :password, confirmation: true
+end

db/migrate/20230808190158_create_users.rb

@@ -0,0 +1,13 @@
+class CreateUsers < ActiveRecord::Migration[7.0]
+  def change
+    create_table :users do |t|
+      t.string :username, null: false, index: { unique: true }
+      t.string :password_digest, null: false
+      t.string :first_name, null: false
+      t.string :last_names, null: false
+      t.string :email, null: false, index: { unique: true }
+
+      t.timestamps
+    end
+  end
+end

db/schema.rb

@@ -0,0 +1,29 @@
+# This file is auto-generated from the current state of the database. Instead
+# of editing this file, please use the migrations feature of Active Record to
+# incrementally modify your database, and then regenerate this schema definition.
+#
+# This file is the source Rails uses to define your schema when running `bin/rails
+# db:schema:load`. When creating a new database, `bin/rails db:schema:load` tends to
+# be faster and is potentially less error prone than running all of your
+# migrations from scratch. Old migrations may fail to apply correctly if those
+# migrations use external dependencies or application code.
+#
+# It's strongly recommended that you check this file into your version control system.
+
+ActiveRecord::Schema[7.0].define(version: 2023_08_08_190158) do
+  # These are extensions that must be enabled in order to support this database
+  enable_extension "plpgsql"
+
+  create_table "users", force: :cascade do |t|
+    t.string "username", null: false
+    t.string "password_digest", null: false
+    t.string "first_name", null: false
+    t.string "last_names", null: false
+    t.string "email", null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+    t.index ["email"], name: "index_users_on_email", unique: true
+    t.index ["username"], name: "index_users_on_username", unique: true
+  end
+
+end

test/fixtures/users.yml

@@ -0,0 +1,6 @@
+user:
+  username: gimli
+  password_digest: <%= BCrypt::Password.create('tolkien-abercrombie-hobb-barker', cost: 5) %>
+  first_name: Gimli
+  last_names: son of Glóin
+  email: gimli@example.com

test/models/user_test.rb

@@ -0,0 +1,9 @@
+require "test_helper"
+
+class UserTest < ActiveSupport::TestCase
+  test "email must resemble an email" do
+    user = users(:user)
+    user.email = "foobar"
+    assert_not user.valid?
+  end
+end