Error 400 – Api Rest

I’m trying to insert a post using the Rest Api, but the same error shows Incorrect password, can you tell me if after creating the credential I need to activate it somewhere?
I say this because I used the same script in another wordpress and it worked

{
“status”: “error”,
“error”: “INVALID_PASSWORD”,
“code”: “400”,
“error_description”: “Incorrect password.”
}