From 6d207c1db9e2bf58de5497b5cab6c50767d85996 Mon Sep 17 00:00:00 2001
From: Sven Augustin <sven.augustin@psi.ch>
Date: Thu, 27 May 2021 15:42:29 +0200
Subject: [PATCH] made AuthClient ABC for early error message

---
 scilog/authclient.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/scilog/authclient.py b/scilog/authclient.py
index 6c39762..f4273aa 100644
--- a/scilog/authclient.py
+++ b/scilog/authclient.py
@@ -1,4 +1,5 @@
 import getpass
+from abc import ABC, abstractmethod
 from .config import Config
 from .utils import typename
 
@@ -9,7 +10,7 @@ AUTH_HEADERS = {
 }
 
 
-class AuthClient:
+class AuthClient(ABC):
 
     def __init__(self, address):
         self.address = address.rstrip("/")
@@ -22,6 +23,10 @@ class AuthClient:
         return f"{tn} @ {self.address}"
 
 
+    @abstractmethod
+    def authenticate(self, username, password):
+        raise NotImplementedError
+
     @property
     def auth_headers(self):
         headers = AUTH_HEADERS.copy()