How to get a Slack user access token (OAuth)
Blog post from Nango
Implementing Slack user access tokens (OAuth) involves setting up an authorization flow, managing token rotation, handling refresh processes, and addressing common OAuth errors for Slack applications. While bot access tokens are sufficient for most use cases, user access tokens are necessary for more personalized interactions like accessing private messages or posting as the user. The guide provides detailed instructions on constructing authorization URLs, exchanging temporary authorization codes for user access tokens, and enabling token rotation for improved security. It also covers handling concurrency issues during token refresh, where race conditions might occur, and recommends encrypting tokens at rest to maintain security. For developers looking to simplify the management of these integrations, platforms like Nango offer pre-built solutions to automate the OAuth flow, manage token lifecycles securely, and prevent concurrency issues, thus easing the complexity of integrating with Slack's API.