diff --git a/app/models/user.rb b/app/models/user.rb
index c822027..b4f95a2 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -1,6 +1,3 @@
 class User < ActiveRecord::Base
-  # Include default devise modules. Others available are:
-  # :confirmable, :lockable, :timeoutable and :omniauthable
-  devise :database_authenticatable, :registerable,
-         :recoverable, :rememberable, :trackable, :validatable
+  devise :timeoutable, :omniauthable, :omniauth_providers => [:zeuswpi]
 end
diff --git a/db/migrate/20150908091028_devise_create_users.rb b/db/migrate/20150908091028_devise_create_users.rb
index c519be3..2d83040 100644
--- a/db/migrate/20150908091028_devise_create_users.rb
+++ b/db/migrate/20150908091028_devise_create_users.rb
@@ -1,45 +1,11 @@
 class DeviseCreateUsers < ActiveRecord::Migration
   def change
     create_table(:users) do |t|
-      ## Database authenticatable
-      t.string :email,              null: false, default: ""
-      t.string :encrypted_password, null: false, default: ""
-
-      ## Recoverable
-      t.string   :reset_password_token
-      t.datetime :reset_password_sent_at
-
-      ## Rememberable
-      t.datetime :remember_created_at
-
-      ## Trackable
-      t.integer  :sign_in_count, default: 0, null: false
-      t.datetime :current_sign_in_at
-      t.datetime :last_sign_in_at
-      t.string   :current_sign_in_ip
-      t.string   :last_sign_in_ip
-
-      ## Confirmable
-      # t.string   :confirmation_token
-      # t.datetime :confirmed_at
-      # t.datetime :confirmation_sent_at
-      # t.string   :unconfirmed_email # Only if using reconfirmable
-
-      ## Lockable
-      # t.integer  :failed_attempts, default: 0, null: false # Only if lock strategy is :failed_attempts
-      # t.string   :unlock_token # Only if unlock strategy is :email or :both
-      # t.datetime :locked_at
-
-      t.string :name
-      t.integer :balance
-      t.boolean :penning
+      t.string :name, index: true, unique: true
+      t.integer :balance, null: false, default: 0, index: true
+      t.boolean :penning, null: false, default: false
 
       t.timestamps null: false
     end
-
-    add_index :users, :email,                unique: true
-    add_index :users, :reset_password_token, unique: true
-    # add_index :users, :confirmation_token,   unique: true
-    # add_index :users, :unlock_token,         unique: true
   end
 end
diff --git a/db/migrate/20150908091546_create_transactions.rb b/db/migrate/20150908091546_create_transactions.rb
index 4ce3de6..de40fa3 100644
--- a/db/migrate/20150908091546_create_transactions.rb
+++ b/db/migrate/20150908091546_create_transactions.rb
@@ -1,10 +1,10 @@
 class CreateTransactions < ActiveRecord::Migration
   def change
     create_table :transactions do |t|
-      t.references :debtor, index: true, foreign_key: true
-      t.references :creditor, index: true, foreign_key: true
-      t.integer :amount
-      t.string :origin
+      t.references :debtor, index: true, foreign_key: true, null: false
+      t.references :creditor, index: true, foreign_key: true, null: false
+      t.integer :amount, null: false, default: 0
+      t.string :origin, null: false
       t.string :message
 
       t.timestamps null: false
diff --git a/db/migrate/20150908092731_create_clients.rb b/db/migrate/20150908092731_create_clients.rb
index dcc340a..8e1edff 100644
--- a/db/migrate/20150908092731_create_clients.rb
+++ b/db/migrate/20150908092731_create_clients.rb
@@ -1,8 +1,8 @@
 class CreateClients < ActiveRecord::Migration
   def change
     create_table :clients do |t|
-      t.string :name
-      t.string :key
+      t.string :name, null: false, index: true, unique: true
+      t.string :key, null: false,  index: true, unique: true
 
       t.timestamps null: false
     end
diff --git a/db/schema.rb b/db/schema.rb
new file mode 100644
index 0000000..b4292bf
--- /dev/null
+++ b/db/schema.rb
@@ -0,0 +1,50 @@
+# encoding: UTF-8
+# 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.
+#
+# Note that this schema.rb definition is the authoritative source for your
+# database schema. If you need to create the application database on another
+# system, you should be using db:schema:load, not running all the migrations
+# from scratch. The latter is a flawed and unsustainable approach (the more migrations
+# you'll amass, the slower it'll run and the greater likelihood for issues).
+#
+# It's strongly recommended that you check this file into your version control system.
+
+ActiveRecord::Schema.define(version: 20150908092731) do
+
+  create_table "clients", force: :cascade do |t|
+    t.string   "name",       null: false
+    t.string   "key",        null: false
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+  end
+
+  add_index "clients", ["key"], name: "index_clients_on_key"
+  add_index "clients", ["name"], name: "index_clients_on_name"
+
+  create_table "transactions", force: :cascade do |t|
+    t.integer  "debtor_id",               null: false
+    t.integer  "creditor_id",             null: false
+    t.integer  "amount",      default: 0, null: false
+    t.string   "origin",                  null: false
+    t.string   "message"
+    t.datetime "created_at",              null: false
+    t.datetime "updated_at",              null: false
+  end
+
+  add_index "transactions", ["creditor_id"], name: "index_transactions_on_creditor_id"
+  add_index "transactions", ["debtor_id"], name: "index_transactions_on_debtor_id"
+
+  create_table "users", force: :cascade do |t|
+    t.string   "name"
+    t.integer  "balance",    default: 0,     null: false
+    t.boolean  "penning",    default: false, null: false
+    t.datetime "created_at",                 null: false
+    t.datetime "updated_at",                 null: false
+  end
+
+  add_index "users", ["balance"], name: "index_users_on_balance"
+  add_index "users", ["name"], name: "index_users_on_name"
+
+end