DOCSP-11560: [mongocli] Clarify API Key role on requirements page (#191)

Author: steveren

source/configure.txt

@@ -30,10 +30,21 @@ command, the {+mcli+} creates a :ref:`configuration file
 Prerequisites
 -------------
 
-To configure the {+mcli+}, you must have or generate a |svc-api-key| for
-your MongoDB service. You must grant the |svc-api-key| the
-``Project Owner`` role and add your |ipaddr| or |cidr| block to
-the |api| whitelist. To learn more about generating a |svc-api-key| for
+To configure the {+mcli+}:
+
+- Add your |ipaddr| or |cidr| block to the |api| whitelist for your
+  MongoDB service.
+- Generate a |svc-api-key| if you don't already have one.
+  
+  .. note::
+
+     |svc-api-key|\s are role-based. Different roles have different
+     privileges and capabilities, and some {+mcli+} commands are available
+     to some roles but not others. Be sure that the roles assisgned to
+     your |svc-api-key| are appropriate for the commands you intend to
+     use.
+
+To learn more about generating a |svc-api-key| for
 your MongoDB service, see the following documentation:
 
 - :atlas:`Atlas API Access </configure-api-access>`