USER ID must be at least 7 characters and up to 20 characters long.
allow English letter but not require.
allow number but not require.
Not allow special characters and space.
USER ID is non case-sensitive.
Password must be at least 7 characters and up to 20 characters long.
Must contain at least one English uppercase letter.
Must contain at least one English lowercase letter.
Must contain at least one number.
Unconditionally special characters "!@#$%^&*()+." must contain at least one of them.
Not allow other special characters and space.
Password is case-sensitive.
Even the administrator cannot know member's password
If you lose your password, administrator can only reset it or change it to a new password for you