error 429 : too many request when run my console application

Shopify Apps
1

hi

i have created a private app in shopify. And connected the app to my database to retrieve all the orders through console application using vb.net. the console application runs automatically every 5 minutes using task scheduler to get the data from shopify. It was working fine. Due to our server down, the console app didnt run for 10 days from 9th Jan 2022. So i try to rerun now, it is returning 3000+ datas so the app is showing error 429 : too many requests. How to solve this?

Dim req1 = System.Net.WebRequest.Create(Url1)
req1.Method = “GET”
req1.ContentType = “application/json”
req1.PreAuthenticate = True
'test
'req1.Credentials = New System.Net.NetworkCredential(“94714252f343a45bf2a34008068cac00”, “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”)
'live
req1.Credentials = New System.Net.NetworkCredential(“556c35ab82851f2ab8219cc3032292b5”, “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”)

Dim response1 As System.Net.WebResponse
response1 = Nothing
Dim shopifyresult As String = “”
response1 = req1.GetResponse()

Using stream1 As Stream = response1.GetResponseStream()
Dim SR1 As StreamReader = New StreamReader(stream1)
shopifyresult = SR1.ReadToEnd()
SR1.Close()
End Using