Use details username only if it's non-blank. Closes gh-104

diff --git a/social_auth/backends/__init__.py b/social_auth/backends/__init__.py
index 4b8fefc39c5f14cd7a85a354e4628c81bf17137c..e1bb5729e5728a241895ab0fa83a4940eb3671aa 100644 (file)
--- a/social_auth/backends/__init__.py
+++ b/social_auth/backends/__init__.py
@@ -166,7 +166,7 @@ class SocialAuthBackend(ModelBackend):
 
         if FORCE_RANDOM_USERNAME:
             username = mk_uuid()
-        elif USERNAME in details:
+        elif details.get(USERNAME):
             username = details[USERNAME]
         elif DEFAULT_USERNAME:
             username = DEFAULT_USERNAME