How to get new access token from refresh token in salesforce?

everyone.

Nice to meet you here.

I got some problems in salesforce integration with web oauth flow and hope someone to help me.

I want to get new access token from refresh token.

So, I upload detail code and screenshots.

code

Result:

result

Connected App Configuration:

conf1

conf2

conf3

Please help me.

You have to use scope with api, id, refresh_token.

Please use the following url for oauth-login: https://login.salesforce.com/services/oauth2/authorize?response_type=code&client_id={SALES_KEY}&redirect_uri={redirect_uri}&scope=api%20id%20refresh_token

Ref: https://medium.com/@bpmmendis94/obtain-access-refresh-tokens-from-salesforce-rest-api-a324fe4ccd9b Get refresh_token for Connected App in SalesForce https://help.salesforce.com/s/articleView?id=sf.remoteaccess_oauth_refresh_token_flow.htm&type=5 https://www.useparagon.com/integration-error-solutions/salesforce-invalid-grant-expired-access-refresh-token