Enabling OAuth Token Endpoint Authentication Methods for Authorization Server
Control how client applications can authenticate with the SecureAuth authorization server.
Select OAuth > Authorization Server > Client Authentication in a workspace of your choice.
Select the check boxes next to the token endpoint authentication methods you wish to allow client apps to use.
When a given client authentication method is enabled, it means that all applications connected to this workspace can use it while authenticating to the SecureAuth authorization server built into the configured workspace.
To configure which method a particular application can use, see Configure Client Authentication for Client App.
Configure the Allowed Response Types.