Usage

1. install node and redis
2. npm install
3. start redis
4. node app

API

Register and Login

1. Register: POST /account/register (do not need to implement)
   payload:

{
    userId: string,
    name: string,
    password: string,
    courses: [
        string
    ]
}

---

2. Login: POST /account/login
   payload:

{
    userId: string,
    password: string
}

respond: 200 - {uuid: string} or 400 - failed
UUID is like user ID but unique for each user

---

3. Get profile: GET /account/:UUID
   response:

200 -  {
    name: string,
    courses: [
        string
    ]
}

or 

400 - failed

4. Get profile picture: GET /account/picture/:UUID
   response: image

---

1. Update profile: PUT /account/:UUID
   payload:

{
    name: string (optional),
    courses: [
        string
    ]
}

Find groups

1. Sign up for study: POST /study/schedule
   payload:

{
    uuid: string,
    date: "DDMMYY",
    maxMembers: int,
    courses: [
        string
    ]
}

2. Remove for study: DELETE /study/schedule
   payload:

{
    uuid: string,
    date: "DDMMYY",
    groupMembers: [
        (UUIDs of group members)
    ],
    courses: [
        string
    ]
}

3. Check status for study group: GET /study/schedule/:UUID
   response:

[
    {
        date: "DDMMYY", 
        courses: [
            string
        ],
        group: [
            (UUIDs of group numbers)
        ]
    }, 
    {
        date: "DDMMYY",
        courses: [
            string
        ],
        group: [
            (UUIDs of group numbers)
        ]
    } 
]