From 047e529fe4c888196c995ebc78c9354220a50a9b Mon Sep 17 00:00:00 2001
From: "Alan D. Tse" <alandtse@gmail.com>
Date: Fri, 24 Jan 2020 01:08:46 -0800
Subject: [PATCH] refactor: improve incomplete credentials message

---
 teslajsonpy/connection.py | 6 +++++-
 teslajsonpy/exceptions.py | 3 +++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/teslajsonpy/connection.py b/teslajsonpy/connection.py
index edb0d4d8..0cb5e569 100644
--- a/teslajsonpy/connection.py
+++ b/teslajsonpy/connection.py
@@ -78,9 +78,13 @@ def generate_oauth(
         elif refresh_token:
             self.oauth["grant_type"] = "refresh_token"
             self.oauth["refresh_token"] = refresh_token
+        elif not refresh_token:
+            raise IncompleteCredentials(
+                "Missing oauth authentication details: refresh token."
+            )
         else:
             raise IncompleteCredentials(
-                "Connection requires email and password or refresh token to authenticate."
+                "Missing oauth authentication details: email and password."
             )
 
     async def get(self, command):
diff --git a/teslajsonpy/exceptions.py b/teslajsonpy/exceptions.py
index df74cd73..e497b6b4 100644
--- a/teslajsonpy/exceptions.py
+++ b/teslajsonpy/exceptions.py
@@ -15,6 +15,9 @@ def __init__(self, code, *args, **kwargs):
         self.message = ""
         super().__init__(*args, **kwargs)
         self.code = code
+        if isinstance(code, str):
+            self.message = self.code
+            return
         if self.code == 401:
             self.message = "UNAUTHORIZED"
         elif self.code == 404: