Within the settings of an FF application we can put in the API key for Gemini AI that would be used globally across all users. However there is a very generous limit for those people who do not want to call the api more than several times a minute. That would basically exclude a popular app having a single key. So my question is can we put in a form where the user puts in their own individual api key that is then accessed when the Gemini action is invoked? I was thinking about something like an application variable, but how would I put the application variable into the settings section of FF? Or how could I achieve the same using custom code.