Clarify SSO to only suggest a different device when using --use-device-code

.changes/next-release/enhancement-sso-54764.json

@@ -0,0 +1,5 @@
+{
+  "type": "enhancement",
+  "category": "``sso``",
+  "description": "Clarify ``aws sso login`` to only suggest a different device when using ``--use-device-code``."
+}

awscli/customizations/sso/utils.py

@@ -179,13 +179,21 @@ def __init__(self, outfile=None, open_browser=None):
     def __call__(
         self, userCode, verificationUri, verificationUriComplete, **kwargs
     ):
-        opening_msg = (
-            f'Attempting to automatically open the SSO authorization page in '
-            f'your default browser.\nIf the browser does not open or you wish '
-            f'to use a different device to authorize this request, open the '
-            f'following URL:\n'
-            f'\n{verificationUri}\n'
-        )
+        if userCode: # only the device code flow supports different devices
+            opening_msg = (
+                f'Attempting to automatically open the SSO authorization page '
+                f'in your default browser.\nIf the browser does not open or '
+                f'you wish to use a different device to authorize this '
+                f'request, open the following URL:\n'
+                f'\n{verificationUri}\n'
+            )
+        else:
+            opening_msg = (
+                f'Attempting to automatically open the SSO authorization page '
+                f'in your default browser.\nIf the browser does not open, open '
+                f'the following URL:\n'
+                f'\n{verificationUri}\n'
+            )
 
         user_code_msg = f'\nThen enter the code:\n\n{userCode}\n'
         uni_print(opening_msg, self._outfile)