Rename password_hash to password_digest

db/migrate/20161208091531_fix_password_hash_name.rb

+class FixPasswordHashName < ActiveRecord::Migration[5.0]
+  def change
+    rename_column :users, :password_hash, :password_digest
+  end
+end

db/schema.rb

 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20161207204407) do
+ActiveRecord::Schema.define(version: 20161208091531) do
 
   create_table "activities", force: :cascade do |t|
     t.string   "public_name"
 
   create_table "users", force: :cascade do |t|
     t.string   "email"
-    t.string   "password_hash"
+    t.string   "password_digest"
     t.string   "confirmation_token"
     t.string   "password_reset_token"
     t.integer  "person_id"