Can you tell me about the devotee Cholkar and his vow related to sugar?

The story of Cholkar, detailed in Chapter 15, is a poignant example of faith and Sai Baba's omniscience. Cholkar, described as a worldly man, made a vow to visit Shirdi. Until he could fulfill this promise, he committed to a personal penance of avoiding sugar entirely, even drinking his tea without it. After some time, he finally made the journey to Shirdi, where he had Baba's darshan, prostrated at His feet, and fulfilled his vow by distributing sugar and offering a coconut. The most remarkable part of his story is how Baba acknowledged this secret vow. As Cholkar was leaving with his host, Jog, Baba instructed Jog to give Cholkar 'cups of tea, well-filled with sugar.' This specific instruction amazed Cholkar, bringing tears of joy to his eyes as he realized Baba knew every detail of his secret devotion.