add -u and -p option to login commnand.

mdrsclient/commands/login.py

@@ -13,14 +13,16 @@ class LoginCommand(BaseCommand):
     @classmethod
     def register(cls, parsers: Any) -> None:
         login_parser = parsers.add_parser("login", help="login to remote host")
+        login_parser.add_argument("-u", "--username", help="login username")
+        login_parser.add_argument("-p", "--password", help="login password")
         login_parser.add_argument("remote", help="label of remote host")
         login_parser.set_defaults(func=cls.func)
 
     @classmethod
     def func(cls, args: Namespace) -> None:
         remote = str(args.remote)
-        username = input("Username: ").strip()
-        password = getpass.getpass("Password: ").strip()
+        username = str(args.username) if args.password else input("Username: ").strip()
+        password = str(args.password) if args.password else getpass.getpass("Password: ").strip()
         cls.login(remote, username, password)
 
     @classmethod