POST: /register
{
"userName": "stranger"
}
GET: /allUsers
POST: /withdraw
{
"username": "vnmc",
"amount": 500000
}
POST: /transfer
{
"from" : "vnmc",
"to": "pnt",
"amount": 500000
}
POST: /recharge-money
{
"username": "vnmc",
"amount": 20000000
}