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.  

[#5]

@Taisia00, Did the response assist in resolving your query? If it did, kindly mark the relevant reply as the solution to aid others in finding the answer more easily in the future.