fix: addresses remaining code review notes and some typos

CONTRIBUTING.md

@@ -132,16 +132,18 @@ tests.
 Integration tests are executed against a real life Firebase project. If you do not already
 have one suitable for running the tests against, you can create a new project in the
 [Firebase Console](https://console.firebase.google.com) following the setup guide below.
-Otherwise you can obtain the following credentials from your current project:
+If you already have a Firebase project, you'll need to obtain credentials to communicate and
+authorize access to your Firebase project:
 
-
-1. Service account certificate: This can be downloaded as a JSON file from the 
-**'Settings > Service Accounts'** tab of the Firebase console when you click the
-**'Generate new private key'** button. Copy the file into the repo so it's available at
+1. Service account certificate: This allows access to your Firebase project through a service account
+which is required for all integration tests. This can be downloaded as a JSON file from the 
+**Settings > Service Accounts** tab of the Firebase console when you click the
+**Generate new private key** button. Copy the file into the repo so it's available at
 `integration_cert.json`.
 
 
-2. Web API key: This is displayed in the **'Settings > General'** tab of the Firebase console
+2. Web API key: This allows for Auth sign-in needed for some Authentication and Tenant Management
+integration tests. This is displayed in the **Settings > General** tab of the Firebase console
 after enabling Authentication as described in the steps below. Copy it and save to a new text
 file at `integration_apikey.txt`.
 
@@ -150,58 +152,58 @@ Set up your Firebase project as follows:
 
 
 1. Enable Authentication:
-   1. Go to the Firebase Console, and select **'Authentication'** from the **'Build'** menu.
-   2. Click on **'Get Started'**.
-   3. Select **'Sign-in method > Add new provider > Email/Password'** then enable both the
-   **'Email/Password'** and **'Email link (passwordless sign-in)'** options.
+   1. Go to the Firebase Console, and select **Authentication** from the **Build** menu.
+   2. Click on **Get Started**.
+   3. Select **Sign-in method > Add new provider > Email/Password** then enable both the
+   **Email/Password** and **Email link (passwordless sign-in)** options.
 
 
 2. Enable Firestore:
-   1. Go to the Firebase Console, and select **'Firestore Database'** from the **'Build'** menu.
-   2. Click on the **'Create database'** button. You can choose to set up Firestore either in
+   1. Go to the Firebase Console, and select **Firestore Database** from the **Build** menu.
+   2. Click on the **Create database** button. You can choose to set up Firestore either in
    the production mode or in the test mode.
 
 
 3. Enable Realtime Database:
-   1. Go to the Firebase Console, and select **'Realtime Database'** from the **'Build'** menu.
-   2. Click on the **'Create database'** button. You can choose to set up the Realtime database
+   1. Go to the Firebase Console, and select **Realtime Database** from the **Build** menu.
+   2. Click on the **Create Database** button. You can choose to set up the Realtime Database
    either in the locked mode or in the test mode.
-   3. In the **'Data'** tab click on the kebab menu (3 dots) and select **'Create Database'**.
-   4. Enter your Project ID (Found in the **'General'** tab in **'Account Settings'**) as the
-   **'Realtime Database reference'**. Again, you can choose to set up the Realtime database
+   3. In the **Data** tab click on the kebab menu (3 dots) and select **Create Database**.
+   4. Enter your Project ID (Found in the **General** tab in **Account Settings**) as the
+   **Realtime Database reference**. Again, you can choose to set up the Realtime Database
    either in the locked mode or in the test mode.
 
 
 4. Enable Storage:
-   1. Go to the Firebase Console, and select **'Storage'** from the **'Build'** menu.
-   2. Click on the **'Get started'** button. You can choose to set up the Realtime database
+   1. Go to the Firebase Console, and select **Storage** from the **Build** menu.
+   2. Click on the **Get started** button. You can choose to set up Cloud Storage
    either in the production mode or in the test mode.
 
 
 5. Enable the IAM API:
-   1. Go to the[Google Cloud Platform Console](https://console.cloud.google.com)
-   and make sureyour Firebase project is selected.
-   2. Select **'APIs & Services'** from the main menu, and click the
-   **'ENABLE APIS AND SERVICES'** button.
-   3. Search for and enable **'Identity and Access Management (IAM) API'** by Google Enterprise API.
+   1. Go to the [Google Cloud console](https://console.cloud.google.com)
+   and make sure your Firebase project is selected.
+   2. Select **APIs & Services** from the main menu, and click the
+   **ENABLE APIS AND SERVICES** button.
+   3. Search for and enable **Identity and Access Management (IAM) API** by Google Enterprise API.
 
 
 6. Enable Tenant Management:
    1. Go to
-   [Google Developers Console | Identity Platform](https://console.cloud.google.com/customer-identity/)
-   and if it is not already enabled, click **'Enable'**.
+   [Google Cloud console | Identity Platform](https://console.cloud.google.com/customer-identity/)
+   and if it is not already enabled, click **Enable**.
    2. Then
    [enable multi-tenancy](https://cloud.google.com/identity-platform/docs/multi-tenancy-quickstart#enabling_multi-tenancy)
-   to enable multi-tenancy.
+   for your project.
 
 
-7. Ensure your service account has the **'Firebase Authentication Admin'** role. This is required
+7. Ensure your service account has the **Firebase Authentication Admin** role. This is required
 to ensure that exported user records contain the password hashes of the user accounts:
-   1. Go to [Google Cloud Platform Console / IAM & admin](https://console.cloud.google.com/iam-admin).
-   2. Find your service account in the list. If not added click the **'pencil'** icon to edit its
+   1. Go to [Google Cloud console | IAM & admin](https://console.cloud.google.com/iam-admin).
+   2. Find your service account in the list. If not added click the **pencil** icon to edit its
    permissions.
-   3. Click **'ADD ANOTHER ROLE'** and choose **'Firebase Authentication Admin'**.
-   4. Click **'SAVE'**.
+   3. Click **ADD ANOTHER ROLE** and choose **Firebase Authentication Admin**.
+   4. Click **SAVE**.
 
 
 Now run the following command to invoke the integration test suite: