Test API Server

Create user and sample tasks:
POST /users.json

List all users:
GET /users.json

Fetch tasks:
GET /tasks.json?key=<USER KEY>

Create tasks:
POST /tasks.json
data:
key=<USER KEY>
task: { "content": <CONTENT>, "is_done": true/false }

Update tasks is_done:
PUT /tasks/.json
data:
key=
task: { "is_done": true/false }

Update tasks anything:
PUT /tasks/.json
data:
key=
task: { "content": , "is_done": true/false }