add models for Project, Task, Note, Category

app/models/user.rb

@@ -1,6 +1,9 @@
 class User < ApplicationRecord
   has_secure_password
   has_many :sessions, dependent: :destroy
+  belongs_to :organization, optional: false
+  has_many :projects
+  has_many :contacts
 
   normalizes :email_address, with: ->(e) { e.strip.downcase }
 end