DOCSP-35882 Atlas support for User Management methods (#6130)

* DOCSP-35873 Test

* edit

update include

---------

Co-authored-by: pierwill <pierwill@users.noreply.github.com>

Author: pierwill

source/includes/fact-environments-atlas-support-no-free-or-m10.rst

@@ -1,4 +1,4 @@
 .. note::
 
-   This command has *no support* in M0, M2, M5, and M10 clusters.
+   This |command| has *limited support* in M0, M2, M5, and M10 clusters.
    For more information, see :atlas:`Unsupported Commands </unsupported-commands>`.

source/reference/method/db.createUser.txt

@@ -187,7 +187,18 @@ Definition
                 The client digests the password and passes the digested
                 password to the server.
 
+Compatibility
+-------------
 
+.. |command| replace:: method
+
+This method is available in deployments hosted in the following environments: 
+
+.. include:: /includes/fact-environments-atlas-only.rst
+
+.. include:: /includes/fact-environments-atlas-support-no-free-or-m10.rst
+
+.. include:: /includes/fact-environments-onprem-only.rst
 
 Roles
 ~~~~~