Add in capability to supply user and password with mongodb

docs/databases/mongo.md

@@ -11,9 +11,11 @@ None.
 ```yaml
 databases:
   mongo:
-    host:       "my host"     # (optional) default "localhost"
+    host:       "my_host"     # (optional) default "localhost"
     port:       "12345"       # (optional) default "27017"
-    database:   "mydatabase"  # (optional) default "opsdroid"
+    database:   "my_database" # (optional) default "opsdroid"
+    user:       "my_user"     # (optional)
+    password:   "pwd123!"     # (optional)
 ```
 
 ## Usage

opsdroid/database/mongo/__init__.py

@@ -7,7 +7,13 @@
 from opsdroid.database import Database
 
 _LOGGER = logging.getLogger(__name__)
-CONFIG_SCHEMA = {"host": str, "port": Any(int, str), "database": str}
+CONFIG_SCHEMA = {
+    "host": str,
+    "port": Any(int, str),
+    "database": str,
+    "user": str,
+    "password": str,
+}
 
 
 class DatabaseMongo(Database):
@@ -37,7 +43,14 @@ async def connect(self):
         host = self.config.get("host", "localhost")
         port = self.config.get("port", "27017")
         database = self.config.get("database", "opsdroid")
-        path = "mongodb://{host}:{port}".format(host=host, port=port)
+        user = self.config.get("user")
+        pwd = self.config.get("password")
+        if user and pwd:
+            path = "mongodb://{user}:{pwd}@{host}:{port}".format(
+                user=user, pwd=pwd, host=host, port=port
+            )
+        else:
+            path = "mongodb://{host}:{port}".format(host=host, port=port)
         self.client = AsyncIOMotorClient(path)
         self.database = self.client[database]
         _LOGGER.info("Connected to MongoDB.")

opsdroid/database/mongo/tests/test_mongo.py

@@ -17,7 +17,13 @@ def test_init(database):
 
 
 @pytest.mark.asyncio
-@pytest.mark.parametrize("config", [{}])
+@pytest.mark.parametrize(
+    "config",
+    [
+        {},
+        {"database": "test_db", "user": "root", "password": "mongo"},
+    ],
+)
 async def test_connect(database):
     """Test that the mongo database has implemented connect function properly"""
     try: