To install the Trello app you must first get your API Key. To do this, login to your Trello account and go to https://trello.com/power-ups/admin.
You'll see a button labelled New, click it to create the Integration.
Next fill in the required information:
- New Power-Up or Integration: this can be anything, something like "Deskpro App" will do
- Workspace: making sure to select the workspace you'd like to give access to
- Iframe connector URL: can leave empty
- Email, Support contact, Author: Contact info for you and your support
When all fields are filled in, click "Create" to create a new Integration, and then we need to "Generate a new API key"
Confirm our choice
Next, we'll need to provide Trello with your Deskpro URL. Click the integration you just created, and navigate to the "API key". Enter your Deskpro URL in the "Allowed Origins" field (You can copy it in the Trello settings on the settings tab).
Click "Add" to add the new allowed origin.
Head back over to Deskpro and in the Settings tab of the app, enter the API Key you copied during creating Integration and paste it into the "API Key" field.
To configure who can see and use the Trello app, head to the "Permissions" tab and select those users and/or groups you'd like to have access.
When you're happy, click "Install".