CreateNote creates a new note to be stored in the user's account.

DeleteNote removes the stored note from the user's account.

ReadAllNotes returns all the notes stored in the user's account.

ReadNote returns the stored note with the given ID.

UpdateNote modifies the stored note with newly submitted contents.

UpdateNoteView adds +1 to the given note's view count.

DDBTable is the DynamoDB table storing the notes data.

Note represents a single note that can be interacted with by the user.

NotePage represents a page of notes.