DOCSP-42514: kotlin user/pass placeholders (mongodb#36)

* DOCSP-42514: kotlin user/pass placeholders

* atlas modal not updated to use these placeholders

Author: rustagir

source/connect.txt

@@ -84,7 +84,7 @@ deployment hosted on Atlas:
 
 .. code-block:: kotlin
 
-   val uri = "mongodb+srv://<username>:<password>@<hostname/port>/?<options>"
+   val uri = "mongodb+srv://<db_username>:<db_password>@<hostname/port>/?<options>"
    val mongoClient = MongoClient.create(uri)
 
 Replica Set
@@ -161,7 +161,7 @@ selection function:
 
 .. code-block:: kotlin
 
-   val client = MongoClient.create("mongodb://<username>:<password>@<hostname>:<port>",
+   val client = MongoClient.create("mongodb://<db_username>:<db_password>@<hostname>:<port>",
                                 server_selector=<selector function>)
 
 .. To learn more about customizing server selection, see

source/includes/connect/compression-tabs.rst

@@ -22,6 +22,6 @@
 
       .. code-block:: kotlin
 
-         val uri = ConnectionString("mongodb+srv://<user>:<password>@<cluster-url>/?compressors=snappy,zlib,zstd")
+         val uri = ConnectionString("mongodb+srv://<db_username>:<db_password>@<cluster-url>/?compressors=snappy,zlib,zstd")
          
          val mongoClient = MongoClient.create(uri)

source/includes/connect/disable-host-verification-tabs.rst

@@ -20,5 +20,5 @@
 
       .. code-block:: kotlin
 
-         val uri = "mongodb://<username>:<password>@<hostname>:<port>/?"tls=true&tlsAllowInvalidHostnames=true"
+         val uri = "mongodb://<db_username>:<db_password>@<hostname>:<port>/?"tls=true&tlsAllowInvalidHostnames=true"
          val mongoClient = MongoClient.create(uri)

source/includes/connect/tls-tabs.rst

@@ -20,5 +20,5 @@
 
       .. code-block:: kotlin
 
-         val uri = "mongodb+srv://<user>:<password>@<cluster-url>?tls=true"
+         val uri = "mongodb+srv://<db_username>:<db_password>@<cluster-url>?tls=true"
          val mongoClient = MongoClient.create(uri)

source/includes/connect/zlib-level-tabs.rst

@@ -19,7 +19,7 @@
 
       .. code-block:: kotlin
 
-         val uri = "mongodb://<username>:<password>@<hostname>:<port>/?" +
+         val uri = "mongodb://<db_username>:<db_password>@<hostname>:<port>/?" +
                    "compressors=zlib" +
                    "zlibCompressionLevel=<zlib compression level>"