StandardOauth2AccessTokenProvider & InvokeHTTP - not working

[#1]

I try get json from API with help InvokeHTTP.

In area Request OAuth2 Access Token Providers i used StandardOauth2AccessTokenProvider

• 08:52:01 UTC

  ERROR

  StandardOauth2AccessTokenProvider[id=2e9e7bd4-019a-1000-f83f-1ef5f5d2d56d] OAuth2 access token request failed [HTTP 400], response:
  {"error":"unsupported_grant_type","error_description":"The authorization grant type is not supported by the authorization server.","hint":"Check that all required parameters have been provided","message":"The authorization grant type is not supported by the authorization server."}

[#2]

1.      Направляем POST-запрос на адрес: https://iflat.io/api/v1/oauth/token
2.      Тело POST-запроса (request body):

{

 "username": "Ваш номер телефона",

  "password": "Ваш пароль",

  "account_id": 501,

  "client_id": 2,

  "client_secret": "wiOJc8yxgiSXDJvkYLkFcUgjtR7SrwPNiDdrt7Di",

 "grant_type": "login"

}

[#3]

@Taisia00, Welcome to our community! To help you get the best possible answer, I have tagged in our NiFi experts @MattWho @haridjh, who may be able to assist you further.

Please feel free to provide any additional information or details about your query, and we hope that you will find a satisfactory solution to your question.

[#4]

@Taisia00 The supported Auth-Grant types in StandardOauth2AccessTokenProvider  are 

• User Password 
• Client Credentials 
• Refresh Token 

Please update the grant-type option in the API request to the supported values . 

Check the below doc for the valid properties/options and further information.
ref doc : 
https://nifi.apache.org/docs/nifi-docs/components/org.apache.nifi/nifi-oauth2-provider-nar/1.28.0/or...

If the above suggestion helps in your requirements, please clink on "Accept as Solution" on this update.