Step 1: Generate an API key
Access MailerLite's integration options in the sidebar
Generate a new token.
Name your token, this name can be anything, but we'll use "RUN!" as an example.
Copy your token and save it somewhere safe, MailerLite only displays this token once.
Step 2: Enter your API key on Run
On the Run form builder, click to add destination, and then enter your MailerLite API key. Confirm that it's connecting correctly under Status after you save.
Step 3: Select MailerLite as the destination on ALL forms you plan to use
On the Run form builder, you must click on the Enable checkbox to the left of the destination for all forms you want to use this destination for on the site.