Initial request: The first set of records is fetched without (also known as null/empty) a cursor.
Subsequent requests: The next (to move forward) or previous (to move backward) cursor for subsequent calls will be the value of the next or previous field of the response you receive for the initial request.
Next cursor: This cursor identifies the last item of the current page and is used to fetch the next set of records.
Previous cursor: This cursor identifies the first item of the previous page and is used to fetch the previous set of records.

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