ریسپانس دریافتی از سرور برای auth/token
{
"error": "unsupported_grant_type",
"message": "The authorization grant type is not supported by the authorization server.",
"hint": "Check the `grant_type` parameter"
}
this is a request
{
"username": "alireza@info.com" ,
"password" : "alireza80"
}