*4.2.1. Process concerning the member registration and login*

All of users' registered information is accumulated in the PostgreSQL connected with the Heroku application. Each user's password is, respectively, made a hash using the Hash function of PHP, and it is accumulated in the database. All of users' registered information and registration time are also accumulated in the database. At the time of login, each user's password is made a hash, and login process is conducted, if a password accords with an ID in the database.
