Add reminder feature

spec/factories/reminders.rb

@@ -0,0 +1,8 @@
+FactoryBot.define do
+  factory :reminder do
+    title { 'TitleTestMsg' }
+    body { 'BodyTestMsg' }
+    date { '2020-02-20 02:02:02' }
+    user
+  end
+end

spec/factories/users.rb

@@ -1,5 +1,6 @@
 FactoryBot.define do
   factory :user do
-    
+    email { 'test@example.com' }
+    password { '123456' }
   end
 end