[Backport v3.11] DOCSP-48710 change user/pw info

source/connect/connection-targets.txt

@@ -32,8 +32,8 @@ To connect to a MongoDB deployment on Atlas, include the following elements
 in your connection string:
 
 - URI of your Atlas cluster
-- MongoDB username
-- MongoDB password
+- MongoDB database username
+- MongoDB database password
 
 Then, pass your connection string to the ``mongocxx::uri`` constructor, and use
 the ``mongocxx::uri`` object to construct a ``mongocxx::client`` object.

source/get-started.txt

@@ -213,10 +213,10 @@ To connect to an instance or deployment not hosted on Atlas, see the
 
    .. step:: Update the Placeholders
 
-      Paste this connection string into a file in your preferred text editor
-	   and replace the ``<username>`` and ``<password>`` placeholders with
-	   your database user's username and password.
-      
+      Paste this connection string into a file in your preferred text editor and replace
+      the ``<username>`` and ``<password>`` placeholders with your database user's
+      username and password.
+
       Save this file to a safe location for use in the next step.
 
 After completing these steps, you have a connection string that

source/security/authentication.txt

@@ -61,8 +61,8 @@ running MongoDB v3.6.
 
 To authenticate with this mechanism, set the following connection options:
 
-- ``db_username``: The username to authenticate. 
-- ``db_password``: The password to authenticate.
+- ``db_username``: The database username to authenticate. 
+- ``db_password``: The databse password to authenticate.
 - ``authSource``: The MongoDB database to authenticate against. By default,
   {+driver-short+} authenticates against the ``admin`` database.
 - ``authMechanism``: Set to ``"SCRAM-SHA-1"``.