CRMJetty Portal supports two types of authentication: Credential as well as OAuth authentication types.
Credentials relate to inserting the Username and Password. OAuth is an open-standard framework or protocol that depicts how unrelated servers and services can safely allow authenticated access to their assets without sharing the initial, single login credentials. In authentication lingo it is considered as secure and delegated authorization.
If you have selected OAuth in the Authentication type then you also need to insert the App ID and Client Secret key.
Read this article to know how you can set the Authentication Type in CRMJetty Portal.