Alamofire: NSLocalizedFailure error (status code 403) - ios

Question

I am trying to retrieve the various user ids from task api, perform a loop on them and POST the array of values to submitScore api.
Desired workflow:
User taps on table cell -> app gets the cell id and display items related to that cell -> user presses a button -> app gets stores data in the form of an array and POSTS to an submitScore api
I can retrieve the various user data with a GET request from task api but I don't know how to:
associate my retrieved ids with the cell id
store the retrieved data (user ids and score) in an array and POST it to my submitScore api in the form below
Array form for POST body:
{ "ratings": [{
"safety_rating_id": 105,
"schedule_job_id": 18,
"score": 9,
"submission_id": 27
},
{
"safety_rating_id": 105,
"schedule_job_id": 18,
"score": 9,
"submission_id": 27
}]
}
Which is why I get thrown this error:
Request failed with error: Error Domain=com.alamofire.error Code=-6003 "Response status code was unacceptable: 403" UserInfo={NSLocalizedFailureReason=Response status code was unacceptable: 403}
Code for POST:
func getTaskDetails(onCompletion: () -> (), onError: ((NSError) -> ())? = nil) {
guard let endPoint = Data.sharedInstance.submitScoreEndpoint
else { print("Empty endpoint"); return }
let user = Users()
let Auth_header = [
"Authorization" : user.token,
]
let parameters = [
"ratings" : [
[
"safety_rating_id" : 106,
"schedule_job_id" : 18,
"score" : 10,
"submission_id" : 27
],
[
"safety_rating_id" : 105,
"schedule_job_id" : 18,
"score" : 9,
"submission_id" : 27
]
]
]
Alamofire.request(.POST, endPoint, headers: Auth_header, parameters: parameters)
.validate()
.responseData {
response in
switch response.result {
case .Success(let data):
let json = JSON(data)
print(json)
onCompletion()
case .Failure(let error):
print("Request failed with error: \(error)")
onError?(error)
}
}
}