The following illustrates an example API key in GOV.UK Notify
API Key
Once you've connected to your council service you need to create a new Text Message template. You do this in the 'Templates' area of GOV.UK Notify.
When you create it you should literally put the following in as the content:
((message))
It should look like this when you've created it:
Text message template in GOV.UK Notify
Now go into OpenProcess and click on the process step you'd like to add an action to. Add the template id to the relevant location:
So the reason that the content of the template you set up is simply:
((message))
Is you will set the content in the 'Personalised Content' when setting up the action. This has the added benefit of the fact you only need to set up one Text Message template id that you can use for ANY actions for sending text messages via GOV.UK Notify.