auth/facebook-redirect.html [65:100]:
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          var token = result.credential.accessToken;
          document.getElementById('quickstart-oauthtoken').textContent = token;
        } else {
          document.getElementById('quickstart-oauthtoken').textContent = 'null';
        }
        // The signed-in user info.
        var user = result.user;
      }).catch(function(error) {
        // Handle Errors here.
        var errorCode = error.code;
        var errorMessage = error.message;
        // The email of the user's account used.
        var email = error.email;
        // The firebase.auth.AuthCredential type that was used.
        var credential = error.credential;
        if (errorCode === 'auth/account-exists-with-different-credential') {
          alert('You have already signed up with a different auth provider for that email.');
          // If you are using multiple auth providers on your app you should handle linking
          // the user's accounts here.
        } else {
          console.error(error);
        }
      });

      // Listening for auth state changes.
      firebase.auth().onAuthStateChanged(function(user) {
        if (user) {
          // User is signed in.
          var displayName = user.displayName;
          var email = user.email;
          var emailVerified = user.emailVerified;
          var photoURL = user.photoURL;
          var isAnonymous = user.isAnonymous;
          var uid = user.uid;
          var providerData = user.providerData;
          document.getElementById('quickstart-sign-in-status').textContent = 'Signed in';
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auth/github-redirect.html [65:100]:
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          var token = result.credential.accessToken;
          document.getElementById('quickstart-oauthtoken').textContent = token;
        } else {
          document.getElementById('quickstart-oauthtoken').textContent = 'null';
        }
        // The signed-in user info.
        var user = result.user;
      }).catch(function(error) {
        // Handle Errors here.
        var errorCode = error.code;
        var errorMessage = error.message;
        // The email of the user's account used.
        var email = error.email;
        // The firebase.auth.AuthCredential type that was used.
        var credential = error.credential;
        if (errorCode === 'auth/account-exists-with-different-credential') {
          alert('You have already signed up with a different auth provider for that email.');
          // If you are using multiple auth providers on your app you should handle linking
          // the user's accounts here.
        } else {
          console.error(error);
        }
      });

      // Listening for auth state changes.
      firebase.auth().onAuthStateChanged(function(user) {
        if (user) {
          // User is signed in.
          var displayName = user.displayName;
          var email = user.email;
          var emailVerified = user.emailVerified;
          var photoURL = user.photoURL;
          var isAnonymous = user.isAnonymous;
          var uid = user.uid;
          var providerData = user.providerData;
          document.getElementById('quickstart-sign-in-status').textContent = 'Signed in';
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