X-Git-Url: https://projects.mako.cc/source/twitter-api-cdsw/blobdiff_plain/ba48aab4fca5486068104ad61b2d37db6f7cc86a..29c8e0142111e03237eb8f92a9470ba90d295e10:/oauthlib/oauth2/rfc6749/grant_types/resource_owner_password_credentials.py

diff --git a/oauthlib/oauth2/rfc6749/grant_types/resource_owner_password_credentials.py b/oauthlib/oauth2/rfc6749/grant_types/resource_owner_password_credentials.py
index c19e6cf..51b7374 100644
--- a/oauthlib/oauth2/rfc6749/grant_types/resource_owner_password_credentials.py
+++ b/oauthlib/oauth2/rfc6749/grant_types/resource_owner_password_credentials.py
@@ -160,7 +160,7 @@ class ResourceOwnerPasswordCredentialsGrant(GrantTypeBase):
         .. _`Section 3.2.1`: http://tools.ietf.org/html/rfc6749#section-3.2.1
         """
         for param in ('grant_type', 'username', 'password'):
-            if not getattr(request, param):
+            if not getattr(request, param, None):
                 raise errors.InvalidRequestError(
                     'Request is missing %s parameter.' % param, request=request)