Protocolo de conexión

$ mongo "mongodb://<user>:<password>@services.cloud.mongodb.com:27020/?authMechanism=PLAIN&authSource=%24external&ssl=true&appName=realm-application-abcde:mongodb-atlas:local-userpass"

mongocxx::instance instance{};
mongocxx::uri uri("mongodb://<user>:<password>@services.cloud.mongodb.com:27020/?authMechanism=PLAIN&authSource=%24external&ssl=true&appName=realm-application-abcde:mongodb-atlas:local-userpass");
mongocxx::client client(uri);

client = pymongo.MongoClient("mongodb://<user>:<password>@services.cloud.mongodb.com:27020/?authMechanism=PLAIN&authSource=%24external&ssl=true&appName=realm-application-abcde:mongodb-atlas:local-userpass")

> use HR
> db.employees.findOne();
{
  "_id": ObjectId("5ae782e48f25b9dc5c51c4a5"),
  "employeeId": 854271626,
  "name": {
    "first": "Lucas",
    "last": "Lewis"
  },
  "role": "PM",
  "salary": 200000,
  "email": "Lucas.Lewis.0271@company.com",
  "password": "<password>",
  "manager": {
    "id": 328892725,
    "email": "Daniel.Wilson.0474@company.com",
    "name": {
      "first": "Daniel",
      "last": "Wilson"
    }
  }
}

mongocxx::database db = client["HR"];
mongocxx::collection employees = db["employees"];
bsoncxx::stdx::optional<bsoncxx::document::value> result =
    collection.find_one({});
if(result) {
    std::cout << bsoncxx::to_json(result) << "\n";
}

>>> db = client["HR"]
>>> employee = db["employees"].find_one();
>>> pprint(employee)
{'_id': ObjectId('5ae782e48f25b9dc5c51c4a5'),
 'email': 'Lucas.Lewis.0271@company.com',
 'employeeId': 854271626.0,
 'manager': {'email': 'Daniel.Wilson.0474@company.com',
             'id': 328892725.0,
             'name': {'first': 'Daniel', 'last': 'Wilson'}},
 'name': {'first': 'Lucas', 'last': 'Lewis'},
 'password': '<password>',
 'role': 'PM',
 'salary': 200000}

> db.runCommand({
...  callFunction: "getEmployeeById",
...  arguments: ["5ae782e48f25b9dc5c51c4a5"]
...});
{
  "ok" : 1,
  "response" : {
    "_id": ObjectId("5ae782e48f25b9dc5c51c4a5"),
    "employeeId": 854271626,
    "name": {
      "first": "Lucas",
      "last": "Lewis"
    },
    "role": "PM",
    "salary": 200000,
    "email": "Lucas.Lewis.0271@company.com",
    "password": "<password>",
    "manager": {
      "id": 328892725,
      "email": "Daniel.Wilson.0474@company.com",
      "name": {
        "first": "Daniel",
        "last": "Wilson"
      }
    }
  }
}

db.runCommand({
  callFunction: "getEmployeeById",
  arguments: ["5ae782e48f25b9dc5c51c4a5"]
});

>>> function_result = db.command("callFunction", "getEmployeeById",
...     arguments=["5ae782e48f25b9dc5c51c4a5"]
...)
>>> pprint.pprint(function_result)
{'ok': 1,
 'response': {'_id': ObjectId('5ae782e48f25b9dc5c51c4a5'),
              'email': 'Lucas.Lewis.0271@company.com',
              'employeeId': 854271626.0,
              'manager': {'email': 'Daniel.Wilson.0474@company.com',
                          'id': 328892725.0,
                          'name': {'first': 'Daniel', 'last': 'Wilson'}},
              'name': {'first': 'Lucas', 'last': 'Lewis'},
              'password': '<password>',
              'role': 'PM',
              'salary': 200000}}

> db.runCommand({
... callServiceFunction: "get",
... service: "http",
... arguments: [{ url: "https://jsonplaceholder.typicode.com/todos/1" }]
... });
{
       "ok" : 1,
       "response" : {
               "status" : "200 OK",
               "statusCode" : 200,
               "contentLength" : NumberLong(-1),
               "headers" : {
                       "Content-Type" : ["application/json; charset=utf-8"],
                       "Connection" : ["keep-alive"],
                       "Vary" : ["Origin, Accept-Encoding"],
                       "X-Content-Type-Options" : ["nosniff"],
                       "Via" : ["1.1 vegur"],
                       "X-Powered-By" : ["Express"],
                       "Cf-Cache-Status" : ["HIT"],
                       "Expect-Ct" : ["max-age=604800, report-uri=\"https://example.com/cdn-cgi/beacon/expect-ct\""],
                       "Set-Cookie" : ["__cfduid=d7f650e765d41beb7598ce2ab62d0c0191536867096; expires=Fri, 13-Sep-19 19:31:36 GMT; path=/; domain=.typicode.com; HttpOnly"],
                       "Access-Control-Allow-Credentials" : ["true"],
                       "Cache-Control" : ["public, max-age=14400"],
                       "Pragma" : ["no-cache"],
                       "Etag" : ["W/\"53-hfEnumeNh6YirfjyjaujcOPPT+s\""],
                       "Server" : ["example.com"],
                       "Cf-Ray" : ["459d08f88e1e56db-IAD"],
                       "Date" : ["Thu, 13 Sep 2018 19:31:36 GMT"],
                       "Expires" : ["Thu, 13 Sep 2018 23:31:36 GMT"]
                },
                "cookies" : {
                       "__cfduid" : {
                               "value" : "d7f650e765d41beb7598ce2ab62d0c0191536867096",
                               "path" : "/",
                               "domain" : ".typicode.com",
                               "expires" : "Mon, 01 Jan 0001 00:00:00 GMT",
                               "maxAge" : 0,
                               "secure" : false,
                               "httpOnly" : true
                       }
                },
                "body" : BinData(0,"ewogICJ1c2VySWQiOiAxLAogICJpZCI6IDEsCiAgInRpdGxlIjogImRlbGVjdHVzIGF1dCBhdXRlbSIsCiAgImNvbXBsZXRlZCI6IGZhbHNlCn0=")
       }
}

db.runCommand({
  callServiceFunction: "get",
  service: "http",
  arguments: [{ url: "https://jsonplaceholder.typicode.com/todos/1" }]
});

>>> result = db.command("callServiceFunction", "get",
...    service="http",
...    arguments=[{"url": "https://jsonplaceholder.typicode.com/todos/1"}]
...)
>>> pprint.pprint(result)
{'ok': 1,
 'response': {'body': b'{\n  "userId": 1,\n  "id": 1,\n  "title": "delectus aut'
                      b' autem",\n  "completed": false\n}',
              'contentLength': -1,
              'cookies': {'__cfduid': {'domain': '.typicode.com',
                                       'expires': 'Mon, 01 Jan 0001 00:00:00 '
                                                  'GMT',
                                       'httpOnly': True,
                                       'maxAge': 0,
                                       'path': '/',
                                       'secure': False,
                                       'value': 'd4b10004e96ca7fee0be03dceebaf2ab71536866400'}},
              'headers': {'Access-Control-Allow-Credentials': ['true'],
                          'Cache-Control': ['public, max-age=14400'],
                          'Cf-Cache-Status': ['HIT'],
                          'Cf-Ray': ['459cf7fc7e20c1bd-IAD'],
                          'Connection': ['keep-alive'],
                          'Content-Type': ['application/json; charset=utf-8'],
                          'Date': ['Thu, 13 Sep 2018 19:20:00 GMT'],
                          'Etag': ['W/"53-hfEnumeNh6YirfjyjaujcOPPT+s"'],
                          'Expect-Ct': ['max-age=604800, '
                                        'report-uri="https://example.com/cdn-cgi/beacon/expect-ct"'],
              'Expires': ['Thu, 13 Sep 2018 23:20:00 GMT'],
              'Pragma': ['no-cache'],
              'Server': ['example.com'],
              'Set-Cookie': ['__cfduid=d4b10004e96ca7fee0be03dceebaf2ab71536866400; '
                             'expires=Fri, 13-Sep-19 19:20:00 GMT; '
                             'path=/; domain=.typicode.com; '
                             'HttpOnly'],
              'Vary': ['Origin, Accept-Encoding'],
              'Via': ['1.1 vegur'],
              'X-Content-Type-Options': ['nosniff'],
              'X-Powered-By': ['Express']},
  'status': '200 OK',
  'statusCode': 200}}

> db.runCommand({ userProfile: 1 });
{
       "ok" : 1,
       "profile" : {
               "userid" : "5ad7a79e8f25b975898d77b8",
               "domainid" : ObjectId("5ad7a69746224c054067c8b1"),
               "identities" : [
                       {
                       }
               ],
               "data" : "{\"email\":\"joe.mango@company.com\"}",
               "type" : "normal",
               "roleassignments" : [ ]
       }
}

db.runCommand({ userProfile: 1 });

>>> result = db.command("userProfile", 1)
>>> pprint.pprint(result)
{'ok': 1,
 'profile': {'data': '{"email":"joe.mango@company.com"}',
             'domainid': ObjectId('5ad7a69746224c054067c8b1'),
             'identities': [{}],
             'roleassignments': [],
             'type': 'normal',
             'userid': '5ad7a79e8f25b975898d77b8'}}