(Quick Reference)
                Service: Save a user
Description: This web service is used to add a new user object to the database
URL: 
https://BASE_URL/api/VERSION/users
: POST
Request content type: application/json
Parameters:
| Name | Description | Type | Required | Example values | 
|---|
| email |  | String | Yes |  | 
| password |  | String | Yes |  | 
| enabled | By default, it is set to true | boolean | no |  | 
| employeeId | The ID of employee | Long/String | yes |  | 
| sendEmail | notify the new user | boolean | no |  | 
| useExternalId | By default, it is set to false. set it to true if you want to use external ids. | Boolean | no | true , false | 
Success Output
 Success case: response.status=201 
{
    "id": 3,
    "email": "foobar@example.com",
    "firstName": "John",
    "lastName": "Doe",
    "reference": "Ref-01",
    "employee": {
      "id": 3,
      "href": "/api/v2.0/employees/3"
    },
    "enabled": true,
    "organization": "entity1",
    "dateCreated": "2017-01-18T17:18:36Z",
    "lastUpdated": "2017-02-16T17:59:09Z"
} Failure Output
 Failure case:response.status = 400 
{
    "error": "missing_param",
    "error_description": "email parameter is missing"
}{
  "error": "not_unique",
  "error_description": "email already used."
}{
     "error": "save_failed",
     "error_description": "Failed to save instance"
} Failure case:response.status = 404 
{
  "error": "not_found",
  "error_description": "The employee with the id 1254 doesn't exist."
} Failure case:response.status = 500 
{
     "error": "server_error",
     "error_description": "Oops! Something went wrong..."
}