API: Add new Get Inbound User (#3644)

* Add GetInboundUser in proto

* Add get user logic for all existing inbounds

* Add inbounduser command

* Add option to get all users

* Fix shadowsocks2022 config

* Fix init users in shadowsocks2022

* Fix copy

* Add inbound user count command

This api costs much less than get inbound user, could be useful in some case

* Update from latest main

main/commands/all/api/inbound_user.go

@@ -0,0 +1,50 @@
+package api
+
+import (
+	handlerService "github.com/xtls/xray-core/app/proxyman/command"
+	"github.com/xtls/xray-core/main/commands/base"
+)
+
+var cmdInboundUser = &base.Command{
+	CustomFlags: true,
+	UsageLine:   "{{.Exec}} api inbounduser [--server=127.0.0.1:8080] -tag=tag [-email=email]",
+	Short:       "Get Inbound User",
+	Long: `
+Get User info from an inbound.
+Arguments:
+	-s, -server 
+		The API server address. Default 127.0.0.1:8080
+	-t, -timeout
+		Timeout seconds to call API. Default 3
+	-tag
+	    Inbound tag
+    -email
+		User email. If email is not given, will get all users
+Example:
+    {{.Exec}} {{.LongName}} --server=127.0.0.1:8080 -tag="tag name" -email="xray@love.com"
+`,
+	Run: executeInboundUser,
+}
+
+func executeInboundUser(cmd *base.Command, args []string) {
+	setSharedFlags(cmd)
+	var tag string
+	var email string
+	cmd.Flag.StringVar(&tag, "tag", "", "")
+	cmd.Flag.StringVar(&email, "email", "", "")
+	cmd.Flag.Parse(args)
+
+	conn, ctx, close := dialAPIServer()
+	defer close()
+
+	client := handlerService.NewHandlerServiceClient(conn)
+	r := &handlerService.GetInboundUserRequest{
+		Tag: tag,
+		Email: email,
+	}
+	resp, err := client.GetInboundUsers(ctx, r)
+	if err != nil {
+		base.Fatalf("failed to get inbound user: %s", err)
+	}
+	showJSONResponse(resp)
+}