Assalamualaikum wa rahmatullahi wa barakatuhu.

I hope this reaches you in the best of health and iman.

I wanted to ask about a hadith regarding imam mahdi;

"On doomsday, a man who is carrying the name of an animal ascends to the throne, after which a man named Abdullah comes to the power. Whoever informs me of his death, I will inform him of the rise [of Mahdi]. After Abdullah passes away, for several days and months, the government will appear” (Ghaybat Al-Tusi).

Is this hadith accurate? 

JazakAllah khair, wassalam