Invalid user credentials Paypal Sandbox test account - ios

Question

I am using latest Paypal SDK for iOS, trying to test login and payment transaction in sandbox environment. I have already created a business account in Sandbox test accounts page. So I have a user email, password and a signature. But I am unable to login using those credentials. I get following error in response:
PayPal SDK: Request has failed with error: invalid_user - Incorrect username/password. Please try again. (401) | PayPal Debug-ID: c3dd83c83d43e | Details: (
{
"error_description" = "Invalid user credentials";
}
).
I am unable to understand the reason for invalid credentials. What credentials I must use in order to login sandbox account from iOS SDK? Or am I missing something in my code?
Code
- (void)viewDidLoad
{
//paypal setup
// Set up payPalConfig
_payPalConfig = [[PayPalConfiguration alloc] init];
_payPalConfig.acceptCreditCards = YES;
_payPalConfig.languageOrLocale = #"en";
_payPalConfig.merchantName = #"Merchant nmae";
_payPalConfig.merchantPrivacyPolicyURL = [NSURL URLWithString:#"https://www.paypal.com/webapps/mpp/ua/privacy-full"];
_payPalConfig.merchantUserAgreementURL = [NSURL URLWithString:#"https://www.paypal.com/webapps/mpp/ua/useragreement-full"];
_payPalConfig.languageOrLocale = [NSLocale preferredLanguages][0];
self.environment = PayPalEnvironmentSandbox;
self.payPalConfig.acceptCreditCards = NO;
}
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:YES];
// Preconnect to PayPal early
[PayPalMobile preconnectWithEnvironment:self.environment];
}
- (IBAction)makePayment:(UIButton *)sender {
if([self.amount.text isEqualToString:#""])
{
[[[UIAlertView alloc] initWithTitle:#"Message" message:#"Please enter amount to proceed" delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil, nil] show];
return;
}
self.resultText = nil;
PayPalPayment *payment = [[PayPalPayment alloc] init];
payment.amount = [[NSDecimalNumber alloc] initWithString:self.amount.text];
payment.currencyCode = #"GBP";
payment.shortDescription = #"Payment for Web77";
if (!payment.processable) {
// This particular payment will always be processable. If, for
// example, the amount was negative or the shortDescription was
// empty, this payment wouldn't be processable, and you'd want
// to handle that here.
[[[UIAlertView alloc] initWithTitle:#"Message" message:#"Payment is unprocessable" delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil, nil] show];
return;
}
PayPalPaymentViewController *paymentViewController = [[PayPalPaymentViewController alloc] initWithPayment:payment configuration:self.payPalConfig delegate:self];
[self presentViewController:paymentViewController animated:YES completion:nil];
}
#pragma mark PayPalPaymentDelegate methods
- (void)payPalPaymentViewController:(PayPalPaymentViewController *)paymentViewController didCompletePayment:(PayPalPayment *)completedPayment {
NSLog(#"PayPal Payment Success!");
self.resultText = [completedPayment description];
[[[UIAlertView alloc] initWithTitle:#"Message" message:#"Please enter amount to proceed" delegate:nil cancelButtonTitle:#"OK" otherButtonTitles:nil, nil] show];
[self sendCompletedPaymentToServer:completedPayment]; // Payment was processed successfully; send to server for verification and fulfillment
[self dismissViewControllerAnimated:YES completion:nil];
}
- (void)payPalPaymentDidCancel:(PayPalPaymentViewController *)paymentViewController {
NSLog(#"PayPal Payment Canceled");
self.resultText = nil;
[self dismissViewControllerAnimated:YES completion:nil];
}
#pragma mark Proof of payment validation
- (void)sendCompletedPaymentToServer:(PayPalPayment *)completedPayment {
// TODO: Send completedPayment.confirmation to server
NSLog(#"Here is your proof of payment:\n\n%#\n\nSend this to your server for confirmation and fulfillment.", completedPayment.confirmation);
}
Note: I have already initialized PayPalMobile with paypal client ID for sandbox environment.
Side Question:
What should merchantName contain? Should it be same as mentioned on paypal site?

Answer 1

#engr-anum does this information help?
While testing your app, when logging in to PayPal in the SDK's UI you should use a personal Sandbox account email and password. I.e., not your Sandbox business credentials.
You can create both business and personal Sandbox accounts on the Sandbox accounts page.
Regarding merchantName: As you'll see in the header file's comments for this property, merchantName applies only when you are using a PayPalFuturePaymentViewController. It is not relevant for a PayPalPaymentViewController.