import requests
url = "https://mail.domain.com"; # this is the url for the api
def auth(username, password):
    global url 
    authurl = url + "/api/v1/auth/authenticate-user" 
    myobj = {'username': username, 'password':password} 
    data = requests.post(authurl, data = myobj) # this posts the username and password to the api
    print(data.json())
    refreshToken = data.json()['refreshToken'] # this is the refresh token
    accessToken = data.json()['accessToken'] # this is the access token
    accessTokenExpiration = data.json()['accessTokenExpiration'] # this is the access token expiration date
    access_info = {'accessToken': accessToken, 'accessTokenExpiration': accessTokenExpiration, 'refreshToken': refreshToken} # this is the access token, refresh token and expiration info
    return access_info # returns the information

def sendmessage(auth):
    global url
    authurl = url + "/api/v1/mail/message-put"
    myobj = {"to":"\"zsylvester@domain.com\" <zsylvester@domain.com>;","cc":"","bcc":"","ownerEmailAddress":"zsylvester@domain.com","from":"zsylvester@domain.com","replyTo":"zsylvester@domain.com","subject":"test","priority":1,"readReceiptRequested":False,"deliveryReceiptRequested":False,"markForFollowup":False,"messageHTML":"test"}
    header = {'Authorization' : 'Bearer ' + auth}
    data = requests.post(authurl, headers=header ,data = myobj)
    return data.json()


auths = auth('zsylvester@domain.com', 'password')
print(auths)
print(sendmessage(auths['accessToken']))

using System;
using System.Net.Http;
using System.Text;
using Newtonsoft.Json;

class Program
{
    static HttpClient client = new HttpClient();
    static string url = "https://mail.domain.com";;

    static void Main(string[] args)
    {
        var auths = Auth("zsylvester@domain.com", "password");
        Console.WriteLine(JsonConvert.SerializeObject(auths));

        var messageResponse = SendMessage(auths.access_token);
        Console.WriteLine(JsonConvert.SerializeObject(messageResponse));
    }

    static dynamic Auth(string username, string password)
    {
        string authUrl = url + "/api/v1/auth/authenticate-user";
        var body = new
        {
            username,
            password
        };
        var json = JsonConvert.SerializeObject(body);
        var content = new StringContent(json, Encoding.UTF8, "application/json");
        var response = client.PostAsync(authUrl, content).Result;

        if (!response.IsSuccessStatusCode)
        {
            throw new Exception($"Authentication failed with status code {response.StatusCode}");
        }

        dynamic result = JsonConvert.DeserializeObject(response.Content.ReadAsStringAsync().Result);

        return new
        {
            access_token = result.accessToken,
            access_token_expiration = result.accessTokenExpiration,
            refresh_token = result.refreshToken
        };
    }

    static dynamic SendMessage(string accessToken)
    {
        string messageUrl = url + "/api/v1/mail/message-put";
        var body = new
        {
            to = "\"zsylvester@domain.com\" <zsylvester@domain.com>;",
            cc = "",
            bcc = "",
            ownerEmailAddress = "zsylvester@domain.com",
            from = "zsylvester@domain.com",
            replyTo = "zsylvester@domain.com",
            subject = "test",
            priority = 1,
            readReceiptRequested = false,
            deliveryReceiptRequested = false,
            markForFollowup = false,
            messageHTML = "test"
        };
        var json = JsonConvert.SerializeObject(body);
        var content = new StringContent(json, Encoding.UTF8, "application/json");
        client.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", accessToken);
        var response = client.PostAsync(messageUrl, content).Result;

        if (!response.IsSuccessStatusCode)
        {
            throw new Exception($"Sending message failed with status code {response.StatusCode}");
        }

        return JsonConvert.DeserializeObject(response.Content.ReadAsStringAsync().Result);
    }
}