Update ephemeral token api

Author: mmourafiq

polyaxon_client/api/auth.py

@@ -101,7 +101,7 @@ def login_experiment_ephemeral_token(self,
                                      project_name,
                                      'experiments',
                                      experiment_id,
-                                     'token')
+                                     'ephemeraltoken')
         try:
             response = self.transport.post(
                 request_url,

tests/test_api/test_auth.py

@@ -76,7 +76,7 @@ def test_login_experiment_ephemeral_token(self):
                 'project',
                 'experiments',
                 '1',
-                'token'
+                'ephemeraltoken'
             ),
             body=json.dumps({'token': token}),
             content_type='application/json', status=200)