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

proxy/shadowsocks_2022/config.go

@@ -1,22 +1,20 @@
 package shadowsocks_2022
 
 import (
+	"google.golang.org/protobuf/proto"
+
 	"github.com/xtls/xray-core/common/protocol"
 )
 
 // MemoryAccount is an account type converted from Account.
 type MemoryAccount struct {
 	Key   string
-	Email string
-	Level int32
 }
 
 // AsAccount implements protocol.AsAccount.
-func (u *User) AsAccount() (protocol.Account, error) {
+func (u *Account) AsAccount() (protocol.Account, error) {
 	return &MemoryAccount{
 		Key:   u.GetKey(),
-		Email: u.GetEmail(),
-		Level: u.GetLevel(),
 	}, nil
 }
 
@@ -27,3 +25,9 @@ func (a *MemoryAccount) Equals(another protocol.Account) bool {
 	}
 	return false
 }
+
+func (a *MemoryAccount) ToProto() proto.Message {
+	return &Account{
+		Key: a.Key,
+	}
+}