如何在nodejs-typescriptapi中的箭头函数循环中获取返回值？

在这里，我使用的是节点crone箭头函数，我无法在cron箭头函数内部获取返回值，如果在返回值ined之后的条件下，我需要在for循环2nd内部使用这个cron箭头，如果我在2nd上方传递这个箭头函数，如果条件promiser显示错误。

我在这里附上了我的代码，我在这里做的事情，如果我注册了，我会收到第一封邮件，在这封邮件中，我有一个确认链接，如果我没有点击，我需要在第二天和第三天发送一封提醒邮件，请确认它应该等待一天，然后自动发送剩余邮件。

const loginemail = async (req: Request) => {
    const connection = await createConnection()
    try {
        const [dashboardJobCount]: any = await connection.query(`select account_id,datediff(now(),created_date) as days,username,verified,email from account where verified=false;`)
       
        const client = Sib.ApiClient.instance
       
        const apiKey = client.authentications['api-key']
        apiKey.apiKey = process.env.SIB_API_KEY

        const tranEmailApi = new Sib.TransactionalEmailsApi()
        
        const sender = {
            email: 'jagadeeshwaran907@gmail.com',
            name: 'Anjan',
        }
        
        cron.schedule('* * * * *', async() => {
            for (let i = 0; i < dashboardJobCount.length; i++) {
           
            const firstMail = {
                sender,
                to:  [{email: dashboardJobCount[i].email}],
                subject: 'Testing mail 1st day',
                textContent: `
            Cules Coding will teach you how to become {{params.role}} a developer.
            `,
            templateId: 1,
           
                params: {
                    role: 'Frontend',
                },
            }
            const secondMail = {
                sender,
                to:[{email: dashboardJobCount[i].email}],
                subject: 'Testing mail 2nd day',
                textContent: `
            Cules Coding will teach you how to become {{params.role}} a developer.
            `,
            templateId: 2,
           
                params: {
                    role: 'Frontend',
                },
            }
            const thirdMail = {
                sender,
                to: [{email: dashboardJobCount[i].email}],
                subject: 'Testing mail 4th day',
                textContent: `
            Cules Coding will teach you how to become {{params.role}} a developer.
            `,
            templateId: 2,
           
                params: {
                    role: 'Frontend',
                },
            }
           
            if([0,1,2].includes(dashboardJobCount[i].days)){
         
                const msg = await tranEmailApi.sendTransacEmail(firstMail)
                console.log("1st",msg)
                return msg
               }
               else if([3].includes(dashboardJobCount[i].days)){
                   const msg = await tranEmailApi.sendTransacEmail(secondMail)
                  // console.log("kkkk", dashboardJobCount[i].days)
                  console.log("2nd",msg)
                   return msg
               }
               else if([4,5,6].includes(dashboardJobCount[i].days)){
                   const msg = await tranEmailApi.sendTransacEmail(thirdMail)
                   console.log("kkkk", dashboardJobCount[i].days)
                   return msg
               }
               else{
                   console.log("your account has deleted")
               }
         
                }              
            }) 
    } catch (error) {
        await connection.end()
        throw error
    }
}