Print a friendlier error message when credentials don't exist

CHANGELOG.md

@@ -6,7 +6,8 @@
 - [aws] Add two minute expiration buffer to TTLs to prevent long-running
   commands from failing by starting the renewal process early.
 - [aws] Display AWS user code during device authorization.
-- [aws] Set `AWS_DEFAULT_REGION` to `us-east-1` by default
+- [aws] Set `AWS_DEFAULT_REGION` to `us-east-1` by default.
+- [aws] Print a friendlier error message when credentials don't exist.
 
 ## 1.1.0 - 2022-10-18
 

authum/plugins/aws/lib.py

@@ -40,7 +40,11 @@ def credentials(
         self, name: str
     ) -> Union["AWSSSORoleCredentials", "AWSSAMLRoleCredentials"]:
         """Return credentials by name"""
-        args = self["credentials"][name]
+        try:
+            args = self["credentials"][name]
+        except KeyError:
+            authum.util.rich_stderr.print(f"No credentials named '{name}'")
+            exit(1)
         if "start_url" in args:
             return AWSSSORoleCredentials(**args)
         else:

tests/test_aws_lib.py

@@ -146,7 +146,7 @@ def test_aws_data(random_string, aws_role_credentials):
     ad.mv_credentials(random_string, new_name)
 
     ad.rm_credentials(new_name)
-    with pytest.raises(KeyError):
+    with pytest.raises(SystemExit):
         ad.credentials(new_name)