Who is This Past Nigerian President Who Allegedly Spent N9.9 billion On A Cake?

BBC journalist Aaron Heslehurst shared this interest tweet on his handle.
Mich Turner is the very popular British cake maker and founder of Little Venice Cake Company, UK.

However, it is not Mz Turner's entrepreneurial skills that interest me, but the whopping amount she gained from our resources via a Nigerian president.
Who is this Nigerian president that allegedly spent a whole 31.3 million dollars (N9.9 billion) on ordinary cake????

See a closer photo of the lucky Mich Turner who collected our 31 million dollars for cake, as well Aaron's reply when asked the identity of this 'Father Christmas' president who doled out such a huge sum on frivolities.

It can't be this present administration. We're broke as it is.