CORS error in SWIFT

[kkadapa]

I keep getting CORS error on SWIFT, i have an account via Azure, is there a workaround to get this working?

statusCode should be 200, but is 400
response = Optional(<NSHTTPURLResponse: 0x60800042cf00> { URL: https://api.sendgrid.com/v3/mail/send } { Status Code: 400, Headers {
"Access-Control-Allow-Headers" = (
"Authorization, Content-Type, On-behalf-of, x-sg-elas-acl"
);
"Access-Control-Allow-Methods" = (
POST
);
"Access-Control-Allow-Origin" = (
"https://sendgrid.api-docs.io"
);
"Access-Control-Max-Age" = (
600
);
Connection = (
"keep-alive"
);
"Content-Length" = (
63
);
"Content-Type" = (
"application/json"
);
Date = (
"Wed, 18 Jul 2018 02:32:42 GMT"
);
Server = (
nginx
);
"X-No-CORS-Reason" = (
"https://sendgrid.com/docs/Classroom/Basics/API/cors.html"
);
} })
responseString = Optional("{"errors":[{"message":"Bad Request","field":null,"help":null}]}")