Send tweets every minute to Mattermost

This workflow executes every minute and fetches the recent tweets from Twitter with the search query n8nio. The workflow is built on the concept of polling. Cron node: The Cron node triggers the workflow every minute. Based on your use-case you can configure the time. You can even use the Interval node to trigger the workflow at a certain time interval. Twitter node: The Twitter node searches for the tweets that contain n8nio and returns the most recent tweets. You can specify a different search query based on your use-case. Set node: The Set node sets the data that we pass on to the next nodes in the workflow. You can set only the values that you require in your workflow. Function node: All

Help me set up the n8n workflow "Send tweets every minute to Mattermost" (https://n8n.io/workflows/875). It uses: Mattermost, X (Formerly Twitter). Import the template JSON into my n8n instance, list every credential I need to create, and walk me through testing it.