You can only integrate ONE (1) Twitter account with each iQueue account (i.e. per Workspace)

This is a different situation from the integrations with other Social Media platforms such as Facebook or LinkedIn where you can have as many integrations as allowed by your plan limits.

Following on from various scandals about the use of Twitter to post multiple tweets to multiple sources, they have introduced new Terms and Conditions to prevent misuse of their platform

This status update from Twitter gives you an idea of their position

Please note that if you have multiple Workspaces within your Wishloop account then each Workspace can integrate a different (single) Twitter account.

How many Twitter Accounts can I integrate with iQueue?