Updates to README and Firestack.m source

Author: auser

README.md

@@ -168,7 +168,15 @@ server.signInWithEmail('ari@fullstack.io', '123456')
 
 #### signInWithProvider()
 
-We can use an external authentication provider, such as twitter/facebook for authentication. In order to use an external provider, we need to include another library.
+We can use an external authentication provider, such as twitter/facebook for authentication. In order to use an external provider, we need to include another library to handle authentication.
+
+> By using a separate library, we can keep our dependencies a little lower and the size of the application down.
+
+We'll use the [react-native-oauth](https://github.com/fullstackreact/react-native-oauth) library, which was built along-side [Firestack](https://github.com/fullstackreact/react-native-firestack) specifically to handle authentication through third-party providers.
+
+> If you prefer to use another library, make sure you pass through the `oauthToken` and `oauthTokenSecret` provided by your other library to call the `signInWithProvider()` method.
+
+Following the instructions at
 
 ...
 

firestack.ios.js

@@ -73,7 +73,6 @@ export default class Firestack {
     return promisify('signInWithProvider')(provider, authToken, authSecret);
   }
 
-
   reauthenticateWithCredentialForProvider(provider, token, secret) {
     return promisify('reauthenticateWithCredentialForProvider')(provider, token, secret);
   }

ios/Firestack/Firestack.m

@@ -51,9 +51,11 @@ @implementation Firestack
                                     NSDictionary *userProps = [self userPropsFromFIRUser:user];
                                     callback(@[[NSNull null], userProps]);
                                   } else {
+                                    NSLog(@"An error occurred: %@", [error localizedDescription]);
                                       // No user is signed in.
                                     NSDictionary *err = @{
-                                                          @"error": @"No user signed in"
+                                                          @"error": @"No user signed in",
+                                                          @"description": [error localizedDescription]
                                                           };
                                     callback(@[err]);
                                   }
@@ -513,7 +515,7 @@ - (FIRAuthCredential *)getCredentialForProvider:(NSString *)provider
                   secret:(NSString *)authTokenSecret
 {
     FIRAuthCredential *credential;
-    if ([provider  isEqual: @"twitter"]) {
+    if ([provider isEqualToString: @"twitter"]) {
         credential = [FIRTwitterAuthProvider credentialWithToken:authToken
                                                           secret:authTokenSecret];
     } else {