🚒 Fixed format path issue error

fixed a typo in argument name handling

Author: guyzmo

git_repo/services/service.py

@@ -195,7 +195,7 @@ def format_path(self, repository, namespace=None, rw=False):
         elif rw and '/' in repo:
             return '{}:{}'.format(self.url_rw, repo)
         else:
-            raise ArgumentError("Cannot tell how to handle this url: `{}/{}`!".format(user, repo_name))
+            raise ArgumentError("Cannot tell how to handle this url: `{}/{}`!".format(namespace, repo))
 
     def pull(self, remote, branch=None):
         '''Pull a repository