The introduction of the Sai Satcharitra explains the origin of the name 'Sai Baba.' Can you detail this event and how the name was formally adopted?

The introduction, found in Chapter 0, recounts that when the Maharaj first arrived in Shirdi, he entered the Khandoba temple wearing a kafni and a cap. There, he was met by a resident named Mhalasapati. Upon seeing him, Mhalasapati greeted him with the words "Aavo Sai Baba," which translates to "Come, Sai Baba." The Maharaj held onto this name for the rest of his life. The text further notes that when his testimony was taken in a commission and he was asked his name, he simply replied, "They call me Sai Baba," cementing the name by which his devotees would know him.