Merge pull request #183 from onuralpszr/invalid_api_key_check

fix: 🐛 check for rlogin is None

roboflow/__init__.py

@@ -87,7 +87,8 @@ def login(workspace=None, force=False):
 
     if os.path.isfile(conf_location) and not force:
         write_line(
-            "You are already logged into Roboflow. To make a different login, run roboflow.login(force=True)."
+            "You are already logged into Roboflow. To make a different login,"
+            "run roboflow.login(force=True)."
         )
         return None
         # we could eventually return the workspace object here
@@ -114,6 +115,10 @@ def login(workspace=None, force=False):
 
     if r_login.status_code == 200:
         r_login = r_login.json()
+        if r_login is None:
+            raise ValueError(
+                "Invalid API key. " "Please check your API key and try again."
+            )
 
         # make config directory if it doesn't exist
         if not os.path.exists(os.path.dirname(conf_location)):