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Since there is some overhead associated with logging in and out, you need to keep the FormsService instance around for as long as you need to interact with frevvo before  before logging out.

How do I get the list of all applications for the current user?

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This is often needed when you need to relate a frevvo form an  form with another concept your application (e.g. you application has the concept of a report that has an associated frevvo form form). In this case you will store the form id somewhere and when needed fetch the form entry to embed it in your page, delete it, etc.
Here is how you get the for a form entry (in fact any entry):

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