You actually can't do this with slack and be compliant with their TOS (https://slack.com/terms-of-service/api https://slack.com/terms-of-service/api): "Functio

You actually can't do this with slack and be compliant with their TOS (https://slack.com/terms-of-service/api https://slack.com/terms-of-service/api): "Functionality. You may not use the Slack API to replicate or compete with core products or services offered by Slack. You acknowledge and agree that Slack has or may in the future offer products or services that are similar to your Application, and nothing will prevent Slack from doing so;" So any communities doing this can get their community shut down by slack at any time.