Magento 2 ups is not working with REST SERVICE option

I am using the UPS shipping method and I am getting shipping rates with the below option.

• United Parcel Service XML

But as I change it to

• United Parcel Service REST

then it stopped working and sending the below response.

Response:

{
“response”:{
“errors”:[
{
“code”:”250002″,
“message”:”Invalid Authentication Information.”
}
]
}
}