I have created an integration in Magento 2.0 from the Magento Admin (System > Extensions > Integrations). Filled required fields like Name, Callback URL, Identity. But I am unable to activate it. Also when I click on activate it redirects to login page but does not come back to Integration page. It gives warning as "Integration 'integration_name' has been sent for activation." Can anybody let me know how much time it takes to activate the integration?