getUser

• code: String – Http code.
• msg: String – Response message.
• object: Object – Object representing the system user.
	o id: Long – System user ID
	o firstName: String – First name.
	o lastName: String – Last name.
	o lastLogin: Date – Last login date.

{
	"code": "200",
	"msg": "User found.",
	"object": {
		"id": 3,
		"firstName": "Edgar",
		"lastName": "Salas",
		"lastLogin": null
	}
}