DOCSP-11985 Stop supporting multiple authentication (#65)

* DOCSP-11985 Stop supporting multiple authentication

* DOCSP-11985 changes for copy review feedback

* DOCSP-11985 update for tech review feedback

* DOCSP-11985 minor correction

Author: kanchana-mongodb

source/includes/fact-connection-limitation.rst

@@ -0,0 +1,8 @@
+.. note:: 
+
+   Only one user can be authenticated on a connection to a {+dl+} at any 
+   given time. If a user authenticates and then runs the ``db.auth()`` command, {+dl+} replaces previous user's permissions with the new user's permissions.
+
+   The :manual:`connectionStatus </reference/command/connectionStatus>` 
+   command shows only the newly authenticated user in the 
+   ``authenticatedUsers`` output field.

source/supported-unsupported/mql-support.txt

@@ -168,6 +168,8 @@ Diagnostic Commands
        the state of authenticated users and their available
        :atlas:`roles </reference/user-roles>`.
 
+       .. include:: /includes/fact-connection-limitation.rst
+
    * - :manual:`dbStats </reference/command/dbStats>`
 
      - The following fields are omitted from the response: 

source/tutorial/connect.txt

@@ -89,6 +89,8 @@ you have the :binary:`~bin.mongo` shell installed:
        content: |
          .. include:: /includes/steps/data-lake-shell-not-installed.rst
 
+.. include:: /includes/fact-connection-limitation.rst
+
 Next Steps
 ----------