DOCSP-48713 Update non-MongoDB credentials

Author: lindseymoore

source/includes/fundamentals/code-snippets/auth-credentials-ldap.rst

@@ -1,6 +1,6 @@
 .. code-block:: java
 
-   MongoCredential credential = MongoCredential.createPlainCredential(<db_username>, "$external", <db_password>);
+   MongoCredential credential = MongoCredential.createPlainCredential(<username>, "$external", <db_password>);
 
    MongoClient mongoClient = MongoClients.create(
        MongoClientSettings.builder()

source/security/auth/ldap.txt

@@ -34,8 +34,8 @@ Code Placeholders
 
 The code examples on this page use the following placeholders:
 
-- ``<db_username>``: Your LDAP username.
-- ``<db_password>``: Your LDAP password.
+- ``<username>``: Your LDAP username.
+- ``<password>``: Your LDAP password.
 - ``<hostname>``: The network address of your MongoDB deployment.
 - ``<port>``: The port number of your MongoDB deployment. If you omit this parameter,
   the driver uses the default port number (``27017``). You don't need to specify a port
@@ -70,7 +70,7 @@ mechanism:
 
       .. code-block:: java
 
-         MongoClient mongoClient = MongoClients.create("<db_username>:<db_password>@<hostname>:<port>/?authSource=$external&authMechanism=PLAIN");
+         MongoClient mongoClient = MongoClients.create("<username>:<password>@<hostname>:<port>/?authSource=$external&authMechanism=PLAIN");
 
    .. tab::
       :tabid: MongoCredential