Create API Register, Login user

[steve-bang]

Create api with Register and login user:

1. Register:

POST api/accounts/register
{
     "emailAddress" : "[email protected]", 
     "password" : "password@example"
}

2. Login

POST api/accounts/login
{
     "emailAddress" : "[email protected]", 
     "password" : "password@example"
}