delete_resolver.js

deleteUser(parent,args,ctx,info){
            const isUserExists = users.findIndex((user)=> user.id === args.author)

            if(!isUserExists){
                throw new Error('User does not exist!')
            }
            //splice will return the removed items from the array object
            const userdeleted = users.splice(isUserExists, 1)
           return userdeleted[0]
        }