Update a user

{
	"user": {
		"username": "jdoe2",
        "firstName": "John",
        "lastName": "Doe",
        "email": "[email protected]",
        "password": "myPa$$w0rd",
        "group": 3
	}
}

{
  "userGroups": [
    {
      "userid": "3",
      "groupid": "3",
      "links": {
        "group": "https://:account.api-us1.com/api/3/userGroups/3/group",
        "user": "https://:account.api-us1.com/api/3/userGroups/3/user"
      },
      "id": "3",
      "group": "3",
      "user": "3"
    }
  ],
  "user": {
    "username": "user",
    "firstName": "John",
    "lastName": "Doe",
    "email": "[email protected]",
    "phone": "",
    "signature": "",
    "userGroup": "3",
    "links": {
      "lists": "https://:account.api-us1.com/api/3/users/3/lists",
      "userGroup": "https://:account.api-us1.com/api/3/users/3/userGroup",
      "dealGroupTotals": "https://:account.api-us1.com/api/3/users/3/dealGroupTotals",
      "dealGroupUsers": "https://:account.api-us1.com/api/3/users/3/dealGroupUsers",
      "configs": "https://:account.api-us1.com/api/3/users/3/configs"
    },
    "id": "3"
  }
}