Fix in auth.py

frappe/auth.py

@@ -81,7 +81,7 @@ class HTTPRequest:
 
 	def connect(self, ac_name = None):
 		"""connect to db, from ac_name or db_name"""
-		frappe.local.db = frappe.db.Database(user = self.get_db_name(), \
+		frappe.local.db = frappe.database.Database(user = self.get_db_name(), \
 			password = getattr(conf,'db_password', ''))
 
 class LoginManager: