Is it possible to add customers to an existing list within a flow based on action or just part of the flow?
Scenario: We have multiple points where we obtain newsletter sign-ups/opt-ins for example, through events, collaborations, API integrations and competitions. I have setup personalised welcome emails to ensure customers are reminded on how/where they have opted-in. I have been manually adding these customers into our standard welcome flow via a list upload but was hoping there might be an easier integrations e.g. being able to ‘add to a list’ node?