builtin/DefaultOAuthCallbackService.java

Handles OAuth callback flow for Slack apps, validating state and exchanging codes.

// Source: https://github.com/slackapi/java-slack-sdk | License: MIT | Copyright 2020 -      Slack Technologies, LLC
// Provided via justclaw.it.com; keep this notice with the code.
package com.slack.api.bolt.service.builtin;

import com.slack.api.app_backend.config.SlackAppConfig;
import com.slack.api.app_backend.oauth.OAuthFlowOperator;
import com.slack.api.app_backend.oauth.payload.VerificationCodePayload;
import com.slack.api.bolt.AppConfig;
import com.slack.api.bolt.request.builtin.OAuthCallbackRequest;
import com.slack.api.bolt.response.Response;
import com.slack.api.bolt.service.OAuthCallbackService;
import com.slack.api.bolt.service.OAuthStateService;
import com.slack.api.bolt.service.builtin.oauth.*;
import com.slack.api.methods.response.oauth.OAuthAccessResponse;
import com.slack

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