Can you tell me the story of Cholkar and how Sai Baba revealed his omniscience through a cup of tea?

The story of Cholkar, as narrated in Chapter 15, is a touching account of faith and divine knowledge. Cholkar, a worldly man, made a vow to visit Shirdi but was delayed. As part of his vow, he completely gave up sugar, even drinking his tea without it. When he finally reached Shirdi, he had Baba's darshan, made an offering of sugar, and felt his desires were fulfilled. The truly miraculous moment occurred when he was leaving with his host, Jog. Sai Baba, who did not drink tea himself, specifically instructed Jog to give Cholkar "cups of tea, well-filled with sugar." This instruction stunned Cholkar, as it was undeniable proof that Baba knew the secret details of his private vow, confirming his faith in Baba's all-knowing nature.