Can you explain how Sai Baba demonstrated his connection to Lord Vitthal through his devotees?

Sai Baba demonstrated his profound connection to Lord Vitthal on several occasions, reinforcing the faith of his devotees. As described in Chapter 4, when he ordered Das Ganu to organize a Name-week (Saptah), he promised that "the form of Vitthal will appear" if the devotee is full of faith, which culminated in Das Ganu receiving a vision. Similarly, when Kakasaheb Dixit had a private vision of Vitthal, Baba confirmed it by asking if "Vitthal Patil had come." Chapter 4 also recounts the story of Bhagwantrao Kshirsagar, whose neglect of his family's Vitthal idol was a cause of concern for Baba, who stated that this neglect was keeping both Vitthal and himself hungry.