Clean up usage of TSAccountManager.

Signal/src/Models/AccountManager.swift

@@ -25,7 +25,7 @@ public class AccountManager: NSObject {
         SwiftSingletons.register(self)
     }
 
-    // MARK: - Singletons
+    // MARK: - Dependencies
 
     private var networkManager: TSNetworkManager {
         return SSKEnvironment.shared.networkManager

Signal/src/ViewControllers/Registration/CodeVerificationViewController.m

@@ -38,6 +38,17 @@ NS_ASSUME_NONNULL_BEGIN
 
 @implementation CodeVerificationViewController
 
+#pragma mark - Dependencies
+
+- (TSAccountManager *)tsAccountManager
+{
+    OWSAssertDebug(SSKEnvironment.shared.tsAccountManager);
+    
+    return SSKEnvironment.shared.tsAccountManager;
+}
+
+#pragma mark -
+
 - (nullable instancetype)initWithCoder:(NSCoder *)aDecoder
 {
     self = [super initWithCoder:aDecoder];
@@ -352,7 +363,7 @@ NS_ASSUME_NONNULL_BEGIN
 
     [_requestCodeAgainSpinner startAnimating];
     __weak CodeVerificationViewController *weakSelf = self;
-    [TSAccountManager
+    [self.tsAccountManager
         rerequestSMSWithSuccess:^{
             OWSLogInfo(@"Successfully requested SMS code");
             [weakSelf enableServerActions:YES];
@@ -375,7 +386,7 @@ NS_ASSUME_NONNULL_BEGIN
 
     [_requestCallSpinner startAnimating];
     __weak CodeVerificationViewController *weakSelf = self;
-    [TSAccountManager
+    [self.tsAccountManager
         rerequestVoiceWithSuccess:^{
             OWSLogInfo(@"Successfully requested voice code");
 

Signal/src/ViewControllers/Registration/RegistrationViewController.m

@@ -43,6 +43,17 @@ NSString *const kKeychainKey_LastRegisteredPhoneNumber = @"kKeychainKey_LastRegi
 
 @implementation RegistrationViewController
 
+#pragma mark - Dependencies
+
+- (TSAccountManager *)tsAccountManager
+{
+    OWSAssertDebug(SSKEnvironment.shared.tsAccountManager);
+    
+    return SSKEnvironment.shared.tsAccountManager;
+}
+
+#pragma mark -
+
 - (void)loadView
 {
     [super loadView];
@@ -287,10 +298,10 @@ NSString *const kKeychainKey_LastRegisteredPhoneNumber = @"kKeychainKey_LastRegi
     [self.spinnerView stopAnimating];
     [self.phoneNumberTextField becomeFirstResponder];
 
-    if ([TSAccountManager sharedInstance].isReregistering) {
+    if (self.tsAccountManager.isReregistering) {
         // If re-registering, pre-populate the country (country code, calling code, country name)
         // and phone number state.
-        NSString *_Nullable phoneNumberE164 = [TSAccountManager sharedInstance].reregisterationPhoneNumber;
+        NSString *_Nullable phoneNumberE164 = self.tsAccountManager.reregisterationPhoneNumber;
         if (!phoneNumberE164) {
             OWSFailDebug(@"Could not resume re-registration; missing phone number.");
         } else if ([self tryToApplyPhoneNumberE164:phoneNumberE164]) {
@@ -441,7 +452,7 @@ NSString *const kKeychainKey_LastRegisteredPhoneNumber = @"kKeychainKey_LastRegi
     [self.phoneNumberTextField resignFirstResponder];
 
     __weak RegistrationViewController *weakSelf = self;
-    [TSAccountManager registerWithPhoneNumber:parsedPhoneNumber
+    [self.tsAccountManager registerWithPhoneNumber:parsedPhoneNumber
         success:^{
             OWSProdInfo([OWSAnalyticsEvents registrationRegisteredPhoneNumber]);
 
@@ -472,7 +483,7 @@ NSString *const kKeychainKey_LastRegisteredPhoneNumber = @"kKeychainKey_LastRegi
 
 - (void)countryCodeRowWasTapped:(UIGestureRecognizer *)sender
 {
-    if (TSAccountManager.sharedInstance.isReregistering) {
+    if (self.tsAccountManager.isReregistering) {
         // Don't let user edit their phone number while re-registering.
         return;
     }

Signal/src/util/Backup/OWSBackup.m

@@ -148,6 +148,13 @@ NSString *NSStringForBackupImportState(OWSBackupState state)
     return SSKEnvironment.shared.primaryStorage;
 }
 
+- (TSAccountManager *)tsAccountManager
+{
+    OWSAssertDebug(SSKEnvironment.shared.tsAccountManager);
+    
+    return SSKEnvironment.shared.tsAccountManager;
+}
+
 #pragma mark - Backup Export
 
 - (void)tryToExportBackup
@@ -270,7 +277,7 @@ NSString *NSStringForBackupImportState(OWSBackupState state)
         // Don't start backups when app is in the background.
         return NO;
     }
-    if (![TSAccountManager isRegistered]) {
+    if (![self.tsAccountManager isRegistered]) {
         return NO;
     }
     return YES;

Signal/src/util/Pastelog.m

@@ -290,6 +290,13 @@ typedef void (^DebugLogUploadFailure)(DebugLogUploader *uploader, NSError *error
     return SSKEnvironment.shared.primaryStorage.dbReadWriteConnection;
 }
 
+- (TSAccountManager *)tsAccountManager
+{
+    OWSAssertDebug(SSKEnvironment.shared.tsAccountManager);
+    
+    return SSKEnvironment.shared.tsAccountManager;
+}
+
 #pragma mark -
 
 + (void)submitLogs
@@ -570,7 +577,7 @@ typedef void (^DebugLogUploadFailure)(DebugLogUploader *uploader, NSError *error
 
 - (void)sendToSelf:(NSURL *)url
 {
-    if (![TSAccountManager isRegistered]) {
+    if (![self.tsAccountManager isRegistered]) {
         return;
     }
     NSString *recipientId = [TSAccountManager localNumber];
@@ -594,7 +601,7 @@ typedef void (^DebugLogUploadFailure)(DebugLogUploader *uploader, NSError *error
 
 - (void)sendToMostRecentThread:(NSURL *)url
 {
-    if (![TSAccountManager isRegistered]) {
+    if (![self.tsAccountManager isRegistered]) {
         return;
     }
 

Signal/src/util/RegistrationUtils.m

@@ -14,6 +14,17 @@ NS_ASSUME_NONNULL_BEGIN
 
 @implementation RegistrationUtils
 
+#pragma mark - Dependencies
+
++ (TSAccountManager *)tsAccountManager
+{
+    OWSAssertDebug(SSKEnvironment.shared.tsAccountManager);
+    
+    return SSKEnvironment.shared.tsAccountManager;
+}
+
+#pragma mark -
+
 + (void)showReregistrationUIFromViewController:(UIViewController *)fromViewController
 {
     UIAlertController *actionSheetController =
@@ -37,7 +48,7 @@ NS_ASSUME_NONNULL_BEGIN
 {
     OWSLogInfo(@"reregisterWithSamePhoneNumber.");
 
-    if (![[TSAccountManager sharedInstance] resetForReregistration]) {
+    if (![self.tsAccountManager resetForReregistration]) {
         OWSFailDebug(@"could not reset for re-registration.");
         return;
     }
@@ -48,8 +59,8 @@ NS_ASSUME_NONNULL_BEGIN
         presentFromViewController:fromViewController
                         canCancel:NO
                   backgroundBlock:^(ModalActivityIndicatorViewController *modalActivityIndicator) {
-                      [TSAccountManager
+                      [self.tsAccountManager
-                          registerWithPhoneNumber:[TSAccountManager sharedInstance].reregisterationPhoneNumber
+                          registerWithPhoneNumber:self.tsAccountManager.reregisterationPhoneNumber
                           success:^{
                               OWSLogInfo(@"re-registering: send verification code succeeded.");
 

SignalMessaging/contacts/OWSSyncManager.m

@@ -215,7 +215,7 @@ NSString *const kSyncManagerLastContactSyncKey = @"kTSStorageManagerOWSSyncManag
 
 - (void)sendConfigurationSyncMessage {
     [AppReadiness runNowOrWhenAppDidBecomeReady:^{
-        if (!TSAccountManager.isRegistered) {
+        if (!self.tsAccountManager.isRegistered) {
             return;
         }
 

SignalMessaging/environment/VersionMigrations.m

@@ -30,7 +30,16 @@ NS_ASSUME_NONNULL_BEGIN
 
 @implementation VersionMigrations
 
-#pragma mark Utility methods
+#pragma mark - Dependencies
+
++ (TSAccountManager *)tsAccountManager
+{
+    OWSAssertDebug(SSKEnvironment.shared.tsAccountManager);
+    
+    return SSKEnvironment.shared.tsAccountManager;
+}
+
+#pragma mark - Utility methods
 
 + (void)performUpdateCheckWithCompletion:(VersionMigrationCompletion)completion
 {
@@ -76,12 +85,12 @@ NS_ASSUME_NONNULL_BEGIN
         [CurrentAppContext().frontmostViewController presentViewController:alertController animated:YES completion:nil];
     }
 
-    if ([self isVersion:previousVersion atLeast:@"2.0.0" andLessThan:@"2.1.70"] && [TSAccountManager isRegistered]) {
+    if ([self isVersion:previousVersion atLeast:@"2.0.0" andLessThan:@"2.1.70"] && [self.tsAccountManager isRegistered]) {
         [self clearVideoCache];
         [self blockingAttributesUpdate];
     }
 
-    if ([self isVersion:previousVersion atLeast:@"2.0.0" andLessThan:@"2.3.0"] && [TSAccountManager isRegistered]) {
+    if ([self isVersion:previousVersion atLeast:@"2.0.0" andLessThan:@"2.3.0"] && [self.tsAccountManager isRegistered]) {
         [self clearBloomFilterCache];
     }
 

SignalMessaging/environment/migrations/OWS103EnableVideoCalling.m

@@ -4,6 +4,7 @@
 
 #import "OWS103EnableVideoCalling.h"
 #import <SignalServiceKit/OWSRequestFactory.h>
+#import <SignalServiceKit/SSKEnvironment.h>
 #import <SignalServiceKit/TSAccountManager.h>
 #import <SignalServiceKit/TSNetworkManager.h>
 
@@ -12,6 +13,17 @@ static NSString *const OWS103EnableVideoCallingMigrationId = @"103";
 
 @implementation OWS103EnableVideoCalling
 
+#pragma mark - Dependencies
+
+- (TSAccountManager *)tsAccountManager
+{
+    OWSAssertDebug(SSKEnvironment.shared.tsAccountManager);
+    
+    return SSKEnvironment.shared.tsAccountManager;
+}
+
+#pragma mark -
+
 + (NSString *)migrationId
 {
     return OWS103EnableVideoCallingMigrationId;
@@ -23,7 +35,7 @@ static NSString *const OWS103EnableVideoCallingMigrationId = @"103";
     OWSAssertDebug(completion);
 
     OWSLogWarn(@"running migration...");
-    if ([TSAccountManager isRegistered]) {
+    if ([self.tsAccountManager isRegistered]) {
         dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
             TSRequest *request = [OWSRequestFactory updateAttributesRequest];
             [[TSNetworkManager sharedManager] makeRequest:request

SignalMessaging/environment/migrations/OWS106EnsureProfileComplete.swift

@@ -44,6 +44,14 @@ public class OWS106EnsureProfileComplete: OWSDatabaseMigration {
      */
     private class CompleteRegistrationFixerJob: NSObject {
 
+        // MARK: - Dependencies
+
+        private var tsAccountManager: TSAccountManager {
+            return TSAccountManager.sharedInstance()
+        }
+
+        // MARK: -
+
         // Duration between retries if update fails.
         let kRetryInterval: TimeInterval = 5
 
@@ -54,7 +62,7 @@ public class OWS106EnsureProfileComplete: OWSDatabaseMigration {
         }
 
         func start() {
-            guard TSAccountManager.isRegistered() else {
+            guard tsAccountManager.isRegistered() else {
                 self.completionHandler(true)
                 return
             }

SignalMessaging/profiles/OWSUserProfile.m

@@ -105,6 +105,13 @@ NSString *const kLocalProfileUniqueId = @"kLocalProfileUniqueId";
     return SSKEnvironment.shared.syncManager;
 }
 
+- (TSAccountManager *)tsAccountManager
+{
+    OWSAssertDebug(SSKEnvironment.shared.tsAccountManager);
+    
+    return SSKEnvironment.shared.tsAccountManager;
+}
+
 #pragma mark -
 
 - (nullable NSString *)avatarUrlPath
@@ -219,7 +226,7 @@ NSString *const kLocalProfileUniqueId = @"kLocalProfileUniqueId";
             // We populate an initial (empty) profile on launch of a new install, but until
             // we have a registered account, syncing will fail (and there could not be any
             // linked device to sync to at this point anyway).
-            if ([TSAccountManager isRegistered] && CurrentAppContext().isMainApp) {
+            if ([self.tsAccountManager isRegistered] && CurrentAppContext().isMainApp) {
                 [self.syncManager syncLocalContact];
             }
 

SignalServiceKit/src/Account/TSAccountManager.h

@@ -17,6 +17,12 @@ extern NSString *const kNSNotificationName_LocalNumberDidChange;
 @class TSNetworkManager;
 @class YapDatabaseReadWriteTransaction;
 
+typedef NS_ENUM(NSUInteger, OWSRegistrationState) {
+    OWSRegistrationState_Unregistered,
+    OWSRegistrationState_PendingBackupRestore,
+    OWSRegistrationState_Registered,
+};
+
 @interface TSAccountManager : NSObject
 
 // This property is exposed for testing purposes only.
@@ -37,7 +43,6 @@ extern NSString *const kNSNotificationName_LocalNumberDidChange;
  *
  *  @return registered or not
  */
-+ (BOOL)isRegistered;
 - (BOOL)isRegistered;
 
 /**
@@ -76,14 +81,14 @@ extern NSString *const kNSNotificationName_LocalNumberDidChange;
 
 #pragma mark - Register with phone number
 
-+ (void)registerWithPhoneNumber:(NSString *)phoneNumber
+- (void)registerWithPhoneNumber:(NSString *)phoneNumber
                         success:(void (^)(void))successBlock
                         failure:(void (^)(NSError *error))failureBlock
                 smsVerification:(BOOL)isSMS;
 
-+ (void)rerequestSMSWithSuccess:(void (^)(void))successBlock failure:(void (^)(NSError *error))failureBlock;
+- (void)rerequestSMSWithSuccess:(void (^)(void))successBlock failure:(void (^)(NSError *error))failureBlock;
 
-+ (void)rerequestVoiceWithSuccess:(void (^)(void))successBlock failure:(void (^)(NSError *error))failureBlock;
+- (void)rerequestVoiceWithSuccess:(void (^)(void))successBlock failure:(void (^)(NSError *error))failureBlock;
 
 - (void)verifyAccountWithCode:(NSString *)verificationCode
                           pin:(nullable NSString *)pin

SignalServiceKit/src/Account/TSAccountManager.m

@@ -135,11 +135,6 @@ NSString *const TSAccountManager_NeedsAccountAttributesUpdateKey = @"TSAccountMa
                                                            userInfo:nil];
 }
 
-+ (BOOL)isRegistered
-{
-    return [[self sharedInstance] isRegistered];
-}
-
 - (BOOL)isRegistered
 {
     @synchronized (self) {
@@ -294,7 +289,7 @@ NSString *const TSAccountManager_NeedsAccountAttributesUpdateKey = @"TSAccountMa
         }];
 }
 
-+ (void)registerWithPhoneNumber:(NSString *)phoneNumber
+- (void)registerWithPhoneNumber:(NSString *)phoneNumber
                         success:(void (^)(void))successBlock
                         failure:(void (^)(NSError *error))failureBlock
                 smsVerification:(BOOL)isSMS
@@ -308,8 +303,7 @@ NSString *const TSAccountManager_NeedsAccountAttributesUpdateKey = @"TSAccountMa
     // The country code of TSAccountManager.phoneNumberAwaitingVerification is used to
     // determine whether or not to use domain fronting, so it needs to be set _before_
     // we make our verification code request.
-    TSAccountManager *manager = [self sharedInstance];
+    self.phoneNumberAwaitingVerification = phoneNumber;
-    manager.phoneNumberAwaitingVerification = phoneNumber;
 
     TSRequest *request =
         [OWSRequestFactory requestVerificationCodeRequestWithPhoneNumber:phoneNumber
@@ -331,21 +325,17 @@ NSString *const TSAccountManager_NeedsAccountAttributesUpdateKey = @"TSAccountMa
         }];
 }
 
-+ (void)rerequestSMSWithSuccess:(void (^)(void))successBlock failure:(void (^)(NSError *error))failureBlock
+- (void)rerequestSMSWithSuccess:(void (^)(void))successBlock failure:(void (^)(NSError *error))failureBlock
 {
-    TSAccountManager *manager = [self sharedInstance];
+    NSString *number          = self.phoneNumberAwaitingVerification;
-    NSString *number          = manager.phoneNumberAwaitingVerification;
-
     OWSAssertDebug(number);
 
     [self registerWithPhoneNumber:number success:successBlock failure:failureBlock smsVerification:YES];
 }
 
-+ (void)rerequestVoiceWithSuccess:(void (^)(void))successBlock failure:(void (^)(NSError *error))failureBlock
+- (void)rerequestVoiceWithSuccess:(void (^)(void))successBlock failure:(void (^)(NSError *error))failureBlock
 {
-    TSAccountManager *manager = [self sharedInstance];
+    NSString *number          = self.phoneNumberAwaitingVerification;
-    NSString *number          = manager.phoneNumberAwaitingVerification;
-
     OWSAssertDebug(number);
 
     [self registerWithPhoneNumber:number success:successBlock failure:failureBlock smsVerification:NO];

SignalServiceKit/src/Account/TSPreKeyManager.m

@@ -7,6 +7,7 @@
 #import "NSURLSessionDataTask+StatusCode.h"
 #import "OWSIdentityManager.h"
 #import "OWSPrimaryStorage+SignedPreKeyStore.h"
+#import "SSKEnvironment.h"
 #import "TSNetworkManager.h"
 #import "TSStorageHeaders.h"
 #import <SignalCoreKit/NSDate+OWS.h>
@@ -36,6 +37,15 @@ static const NSUInteger kMaxPrekeyUpdateFailureCount = 5;
 
 @implementation TSPreKeyManager
 
+#pragma mark - Dependencies
+
++ (TSAccountManager *)tsAccountManager
+{
+    OWSAssertDebug(SSKEnvironment.shared.tsAccountManager);
+    
+    return SSKEnvironment.shared.tsAccountManager;
+}
+
 #pragma mark - State Tracking
 
 + (BOOL)isAppLockedDueToPreKeyUpdateFailures
@@ -102,7 +112,7 @@ static const NSUInteger kMaxPrekeyUpdateFailureCount = 5;
     }
     OWSAssertDebug(CurrentAppContext().isMainAppAndActive);
 
-    if (!TSAccountManager.isRegistered) {
+    if (!self.tsAccountManager.isRegistered) {
         return;
     }
 

SignalServiceKit/src/Messages/OWSMessageDecrypter.m

@@ -131,6 +131,13 @@ NSError *EnsureDecryptError(NSError *_Nullable error, NSString *fallbackErrorDes
     return SSKEnvironment.shared.udManager;
 }
 
+- (TSAccountManager *)tsAccountManager
+{
+    OWSAssertDebug(SSKEnvironment.shared.tsAccountManager);
+    
+    return SSKEnvironment.shared.tsAccountManager;
+}
+
 #pragma mark - Blocking
 
 - (BOOL)isEnvelopeSenderBlocked:(SSKProtoEnvelope *)envelope
@@ -140,11 +147,6 @@ NSError *EnsureDecryptError(NSError *_Nullable error, NSString *fallbackErrorDes
     return [self.blockingManager.blockedPhoneNumbers containsObject:envelope.source];
 }
 
-- (TSAccountManager *)tsAccountManager
-{
-    return TSAccountManager.sharedInstance;
-}
-
 #pragma mark - Decryption
 
 - (void)decryptEnvelope:(SSKProtoEnvelope *)envelope
@@ -156,7 +158,7 @@ NSError *EnsureDecryptError(NSError *_Nullable error, NSString *fallbackErrorDes
     OWSAssertDebug(envelopeData);
     OWSAssertDebug(successBlockParameter);
     OWSAssertDebug(failureBlockParameter);
-    OWSAssertDebug([TSAccountManager isRegistered]);
+    OWSAssertDebug([self.tsAccountManager isRegistered]);
 
     // successBlock is called synchronously so that we can avail ourselves of
     // the transaction.

SignalServiceKit/src/Messages/OWSMessageManager.m

@@ -236,7 +236,7 @@ NS_ASSUME_NONNULL_BEGIN
         OWSFail(@"Missing transaction.");
         return;
     }
-    if (!TSAccountManager.isRegistered) {
+    if (!self.tsAccountManager.isRegistered) {
         OWSFailDebug(@"Not registered.");
         return;
     }

SignalServiceKit/src/Messages/UD/OWSUDManager.swift

@@ -123,7 +123,7 @@ public class OWSUDManagerImpl: NSObject, OWSUDManager {
 
     @objc public func setup() {
         AppReadiness.runNowOrWhenAppDidBecomeReady {
-            guard TSAccountManager.isRegistered() else {
+            guard self.tsAccountManager.isRegistered() else {
                 return
             }
 

SignalServiceKit/src/Network/WebSockets/OWSWebSocket.m

@@ -912,7 +912,7 @@ NSString *const kNSNotification_OWSWebSocketStateDidChange = @"kNSNotification_O
         return NO;
     }
 
-    if (![TSAccountManager isRegistered]) {
+    if (![self.tsAccountManager isRegistered]) {
         return NO;
     }
 

SignalShareExtension/ShareViewController.swift

@@ -12,6 +12,14 @@ import PromiseKit
 @objc
 public class ShareViewController: UIViewController, ShareViewDelegate, SAEFailedViewDelegate {
 
+    // MARK: - Dependencies
+
+    private var tsAccountManager: TSAccountManager {
+        return TSAccountManager.sharedInstance()
+    }
+
+    // MARK: -
+
     enum ShareViewControllerError: Error {
         case assertionError(description: String)
         case unsupportedMedia
@@ -171,7 +179,7 @@ public class ShareViewController: UIViewController, ShareViewDelegate, SAEFailed
 
         // We don't need to use RTCInitializeSSL() in the SAE.
 
-        if TSAccountManager.isRegistered() {
+        if tsAccountManager.isRegistered() {
             // At this point, potentially lengthy DB locking migrations could be running.
             // Avoid blocking app launch by putting all further possible DB access in async block
             DispatchQueue.global().async { [weak self] in
@@ -192,7 +200,7 @@ public class ShareViewController: UIViewController, ShareViewDelegate, SAEFailed
             // We don't need to prod the TSSocketManager in the SAE.
         }
 
-        if TSAccountManager.isRegistered() {
+        if tsAccountManager.isRegistered() {
             DispatchQueue.main.async { [weak self] in
                 guard let _ = self else { return }
                 Logger.info("running post launch block for registered user: \(TSAccountManager.localNumber)")
@@ -253,7 +261,7 @@ public class ShareViewController: UIViewController, ShareViewDelegate, SAEFailed
         // it will also run all deferred blocks.
         AppReadiness.setAppIsReady()
 
-        if TSAccountManager.isRegistered() {
+        if tsAccountManager.isRegistered() {
             Logger.info("localNumber: \(TSAccountManager.localNumber)")
 
             // We don't need to use messageFetcherJob in the SAE.
@@ -285,7 +293,7 @@ public class ShareViewController: UIViewController, ShareViewDelegate, SAEFailed
 
         Logger.debug("")
 
-        if TSAccountManager.isRegistered() {
+        if tsAccountManager.isRegistered() {
             Logger.info("localNumber: \(TSAccountManager.localNumber)")
 
             // We don't need to use ExperienceUpgradeFinder in the SAE.
@@ -325,7 +333,7 @@ public class ShareViewController: UIViewController, ShareViewDelegate, SAEFailed
 
         Logger.info("Presenting content view")
 
-        if !TSAccountManager.isRegistered() {
+        if !tsAccountManager.isRegistered() {
             showNotRegisteredView()
         } else if !OWSProfileManager.shared().localProfileExists() {
             // This is a rare edge case, but we want to ensure that the user
@@ -451,7 +459,7 @@ public class ShareViewController: UIViewController, ShareViewDelegate, SAEFailed
 
         // If a user unregisters in the main app, the SAE should shut down
         // immediately.
-        guard !TSAccountManager.isRegistered() else {
+        guard !tsAccountManager.isRegistered() else {
             // If user is registered, do nothing.
             return
         }