flow:

1. User Register

User input email and password to register as user.

Scenario

• When user input valid email and password, it should return success.
• When user input duplicate email, it should return error.

System Requirement

• password should be hashed

2. User Login

User login system by email and password

Scenario

• When user input email and password correctly, it should return access token.
• When user input wrong email, it should return error.
• [TODO] When user input wrong credential too often (maybe 5 times in a minute), system should banned the account.

System Requirement

• [TODO] Rate limit on trying email and password.

3. User list files

User list down all the files that have been created.