Write to Google Sheets in Swift - ios

Question

I'm really confused how to write to an excel sheet, that is public. So far I have downloaded Alamofire and GoogleAPIClientForREST cocoapods. So I was wondering, if I want to write to the sheet do I first need to implement a google sign in or can I just send data over using Alamofire. I am super lost so If someone can help me that would be great.
Google sheet: https://docs.google.com/spreadsheets/d/1zJR0uk6Pb6BuxJihFyxwe4ipQdBY4E9FFR74geBj8p0/edit#gid=0
func makeAndSendRequest() {
let baseUrl = "https://sheets.googleapis.com/v4/spreadsheets"
let spreadsheetId = "1zJR0uk6Pb6BuxJihFyxwe4ipQdBY4E9FFR74geBj8p0"
let params = ["valueInputOption": "RAW"]
let range = "Studen!A3:B3"
//need to add params
let url = baseUrl + "/" + spreadsheetId + "/values/" + range + "/valueInputOption=RAW/"
let fullUrl = URL(string: url)!
//my values
let requestParams = [
"values": [
1,
2
]
]
//my auth is after Bearer so "Bearer 901390"
let header = ["Authorization":"Bearer "]
let requestURL = "https://sheets.googleapis.com/v4/spreadsheets/\(spreadsheetId)/values/\(range)?valueInputOption=RAW"
let req = Alamofire.request(requestURL, method: .put, parameters: requestParams, encoding: JSONEncoding.default,headers: header)
req.responseJSON { response in debugPrint(response) }
}

Answer 1

Try to fix this first.
valueInputOption is a query parameter, see: https://developers.google.com/sheets/api/reference/rest/v4/spreadsheets.values/update
You URL should at least be:
let url = baseUrl + "/" + spreadsheetId + "/values/" + range + "?valueInputOption=RAW"
next you need to fix your request body, range is required per document here: https://developers.google.com/sheets/api/reference/rest/v4/spreadsheets.values/update
{
"range": "A3:B3",
"values": [
[
1,
2
]
]
}
This range should be same as your range in your query parameter, say Sheet1!:A3:B3 as in your query parameter.
Note that it starts with the sheet name, it should not be "studen"
I have used the playground tool on the same page and able to call the api to change the data in your spreadsheet.
At the end I am getting 200 response code and following json:
{
"spreadsheetId": "1zJR0uk6Pb6BuxJihFyxwe4ipQdBY4E9FFR74geBj8p0",
"updatedRange": "Sheet1!A3:B3",
"updatedRows": 1,
"updatedColumns": 2,
"updatedCells": 2
}
----- Edit -----
As you asked, the API needs Oauth token, the framework to handle this is actually called G Suite
Please find the guide here:
https://developers.google.com/gsuite/guides/ios