Determines the best client authentication method to use based on server support and client configuration.
Priority order (highest to lowest):
client_secret_basic
client_secret_post
none
OAuth client information containing credentials
Authentication methods supported by the authorization server
The selected authentication method
Determines the best client authentication method to use based on server support and client configuration.
Priority order (highest to lowest):
client_secret_basic(if client secret is available)client_secret_post(if client secret is available)none(for public clients)