feat: add multiple authentication methods, token and oidc.

token is the current token comparison, and oidc generates oidc token using client-credentials flow. in addition - add ping verification using the same method

cmd/frpc/sub/root.go

@@ -28,6 +28,7 @@ import (
 	"github.com/spf13/cobra"
 
 	"github.com/fatedier/frp/client"
+	"github.com/fatedier/frp/models/auth"
 	"github.com/fatedier/frp/models/config"
 	"github.com/fatedier/frp/utils/log"
 	"github.com/fatedier/frp/utils/version"
@@ -157,7 +158,6 @@ func parseClientCommonCfgFromCmd() (cfg config.ClientCommonConf, err error) {
 
 	cfg.User = user
 	cfg.Protocol = protocol
-	cfg.Token = token
 	cfg.LogLevel = logLevel
 	cfg.LogFile = logFile
 	cfg.LogMaxDays = int64(logMaxDays)
@@ -168,6 +168,10 @@ func parseClientCommonCfgFromCmd() (cfg config.ClientCommonConf, err error) {
 	}
 	cfg.DisableLogColor = disableLogColor
 
+	// Only token authentication is supported in cmd mode
+	cfg.AuthClientConfig = auth.GetDefaultAuthClientConf()
+	cfg.Token = token
+
 	return
 }