To use any of the Insightly modules, you need to connect your Insightly account to Integromat. If you do not have an Insightly account yet, you can create one at Insightly.
To connect your Insightly account to Integromat, follow the general instructions for Connecting to services. You will be prompted to enter your Insightly API key. It can be found after you login into Insightly, under the User Settings.