phase002 complete

app/models/user.rb

@@ -0,0 +1,15 @@
+class User < ApplicationRecord
+  has_many :fuel_entries, foreign_key: :updated_by_user_id, dependent: :restrict_with_error, inverse_of: :updated_by_user
+  has_many :maintenance_entries, foreign_key: :updated_by_user_id, dependent: :restrict_with_error, inverse_of: :updated_by_user
+
+  before_validation :normalize_email
+
+  validates :name, presence: true
+  validates :email, presence: true, uniqueness: { case_sensitive: false }
+
+  private
+
+  def normalize_email
+    self.email = email.to_s.strip.downcase if email.present?
+  end
+end