How can I need to pass the array in mutation as an input in QraphQL?

I have to use the mutation type of query in QraphQL. I need to add a number of users in Liferay from my custom API. (Not using any of Liferay's out-of-the-box API.)

Then, How can I need to pass the array in mutation as an input in QraphQL?

My request body is something like that is

[ { "UserName": "string", "UserEmailId": "string" }, { "UserName": "string", "UserEmailId": "string" }, { "UserName": "string", "UserEmailId": "string" }, ]