The 22-year-old won the BBC's Women's Footballer of the Year Award in 2015 before joining Arsenal from Liverpool.
She helped the Gunners win the Women's FA Cup at Wembley in May 2016 and was recently awarded the African Women's Player of the Year Award.
She also played for her country at the 2015 Women's World Cup in Canada.

Salman Ramadan Abedi, 22, detonated a homemade device in the foyer of Manchester Arena following an Ariana Grande concert on 22 May.
The five-minute hearing was adjourned until 1 December, pending the police investigation.
Twenty-two people were killed in the arena attack.
No members of Abedi's family were present at court, which was sitting at Manchester Town Hall.
A full inquest will be heard once the police investigation into the attack has been completed.
The court heard Abedi died of "multiple injuries" when he detonated an improvised explosive device.
He was later identified by genetic markers and his bank card that was found nearby, the court heard.
The inquests for the victims were opened with a minute's silence on 9 June and adjourned until November.
Coroner Nigel Meadows said the victims' inquests, at Manchester Civil Justice Centre, would be adjourned until 24 November and this was a "holding date" which could be moved if the police investigation was still ongoing.
The hearing on 9 June was shown a photograph of each of the victims and told of their injuries. Those who died were aged between eight and 51.
A map of where 19 of those killed in the foyer was also shown to the hearing.  The court heard a further three - John Atkinson, Georgina Callander and Saffie Roussos - died later in hospital.
Some of those who died were standing very close to the bomber, with others as far as 20m (66ft) away.
A further 116 people were injured in the attack.

The 35-year-old schoolteacher told the court that her digestive system sometimes converts food into alcohol.
After her arrest, her doctor conducted tests that found that high levels of yeast in her intestines ferment high-carbohydrate foods.
Prosecutors are seeking to have the charges against the woman reinstated.
"She can register a blood alcohol content that would have you or I falling down drunk, but she can function," her lawyer Joseph Marusak told the Buffalo News.
Mr Marusak declined to name his client, citing medical confidentiality laws.
The woman was arrested near Buffalo in October 2014 after police said she was driving erratically. A Breathalyzer test showed that her blood-alcohol level more than four times the legal limit.
The arresting officer said she failed several field sobriety tests.
Medical and legal experts say the condition, also known as gut fermentation syndrome, is being raised more frequently as a defence in drink-driving cases.
"At first glance, it seems like a get-out-of-jail-free card," Jonathan Turley, a law professor at George Washington University, told the Associated Press. "But it's not that easy. Courts tend to be sceptical of such claims. You have to be able to document the syndrome through recognized testing."
Nigeria winger Asisat Oshoala has left Women's Super League One club Arsenal Ladies to join Chinese side Dalian Quanjian.
[NEXT_CONCEPT]
An inquest into the death of the Manchester suicide bomber heard how he was identified by DNA, fingerprint and dental records.
[NEXT_CONCEPT]
A US woman in New York state has avoided drink-driving charges after arguing that she suffers from a rare condition called "auto-brewery syndrome".