"As young Africans, we hope the United States help preserve some of the lofty ideals of equal representation for Africa on the UN Security Council President Mugabe advocated for", Irbard said.
Mugabe resigned on Tuesday as MPs were in the process of impeaching him.
Mugabe, 93, who had been at the helm of the southern African country since independence from Britain in 1980, stepped down earlier this week, succumbing to pressure from within his own ruling party, the military, as well as angry citizens grappling with high unemployment, chronic cash shortages and crumbling infrastructure.
The report quoted a government source as saying that Mugabe told negotiators that he wanted to die in Zimbabwe and that he had no intentions to live in exile.
Lawmakers roared in jubilation and people have begun celebrating in the streets.
Mr Mugabe has not been seen in public since he delivered a televised address on Sunday night.
"The immediate priority is to ensure that Zimbabwe has a legitimate government, appointed through free and fair elections in accordance with the constitution".
"Working with our South African friends, with everybody in the region, that is what we are going to be encouraging, that is the choice we are going to encourage the Zimbabweans to make".
"It's time now for a new future and how Robert Mugabe spends the rest of his years is very much a matter for his countrymen".
Asked if Mugabe and his wife, Grace, should face justice, Johnson says: "That is a decision for the people of Zimbabwe".