HttpRequest

void SetHeader(string name, string value);

void Send();

void SetFileContent(DocumentExportResult documentExportResult, string mediaType?);
void SetFileContent(BinaryFile binaryFile, string mediaType?);

void SetSourceFileContent(string mediaType?);

void SetStringContent(string content, ContentEncoding contentEncoding?, string mediaType?);

void SetUrlFormEncodedContent(any content);

var form = {};
form.grant_type = "password";
form.scope = "openid permissions";
form.client_id = "value of client_id";
form.client_secret = "value of client_secret";
form.password = "Password";
form.username = "User Name";
request.SetUrlFormEncodedContent(form);