POST http://localhost:3000/auth/register
content-type: application/json

{
    "username": "nikki",
    "email": "nikki@gmail.com",
    "password": "password",
    "password_confirmation": "password"
}

###
POST http://localhost:3000/auth/login
content-type: application/json

{
    "email": "nikki@gmail.com",
    "password": "password"
}