1 files changed, 12 insertions, 0 deletions
diff --git a/oauthlib/oauth2/rfc6749/errors.py b/oauthlib/oauth2/rfc6749/errors.py
index 5a0cca2..8882ab2 100644
--- a/oauthlib/oauth2/rfc6749/errors.py
+++ b/oauthlib/oauth2/rfc6749/errors.py
@@ -313,6 +313,7 @@ class ConsentRequired(OAuth2Error):
     error = 'consent_required'
     status_code = 401
 
+
 class LoginRequired(OAuth2Error):
     """
     The Authorization Server requires End-User authentication.
@@ -325,6 +326,16 @@ class LoginRequired(OAuth2Error):
     status_code = 401
 
 
+class CustomOAuth2Error(OAuth2Error):
+    """
+    This error is a placeholder for all custom errors not described by the RFC.
+    Some of the popular OAuth2 providers are using custom errors.
+    """
+    def __init__(self, error, *args, **kwargs):
+        self.error = error
+        super().__init__(*args, **kwargs)
+
+
 def raise_from_error(error, params=None):
     import inspect
     import sys
@@ -336,3 +347,4 @@ def raise_from_error(error, params=None):
     for _, cls in inspect.getmembers(sys.modules[__name__], inspect.isclass):
         if cls.error == error:
             raise cls(**kwargs)
+    raise CustomOAuth2Error(error=error, **kwargs)