Please read through below documents. Only Gujarati people will understand. I will try to translate in English very soon.
In Hinduism, there are 4 main yugs: Satya Yug, Treta Yug, Dwapar Yug and Kali Yug. Currently, humans are living in Kali Yug. In past, there were many people who called themselves god/bhagwan, and many will take birth and call themselves god, but one should understand god.