Vrndavana dasa Thakura is the authorized writer
Sri Caitanya-caritamrta
CC Adi-lila
CC Adi 8.83, Translation: Śrīla Vṛndāvana dāsa Ṭhākura is the authorized writer on the pastimes of Lord Caitanya. Without his mercy, therefore, one cannot describe these pastimes.
CC Madhya-lila
CC Madhya 1.14, Translation: Actually the authorized compiler of the pastimes of Śrī Caitanya Mahāprabhu is Śrīla Vṛndāvana dāsa, the incarnation of Vyāsadeva. Only upon his orders am I trying to chew the remnants of food that he has left.