How can I add a configuration page for my slack app?

Question

How can I add a configuration page for my slack app?

example: asana has an add configuration button which leads to a page which we can use to then connect the slack user account with asana account

Answer 1

Several Slack apps (e.g. Twitter, Google Calendar) provide a configuration page after installation into Slack. However this feature seams to be available only to commercial partners of Slack, but not as a standard feature for every app developers.

Developers need to implement it by themselves with an external app / script that is linked the Slack app and store the configurations in their own database.

See also this answer for a full explanation on how this works.

Looking on the official Slack Plattform Roadmap for Developers this feature might be implemented in the future under "Install apps from within Slack".

Update:

You can now use Dialogs to create something similar to configuration pages. It allows you to open a custom modal window with up to 5 inputs (text or drop-downs). Its still not the same as having a full configuration page like the internal Slack apps have, but its a huge step forward and might be sufficient for many cases.