Added userid to review

[jesshan700]

Added user field uid to Review

This pull request is the first step towards implementing feature Foo

• Saves userid when submitting a review so that reviews can be associated with user.

Test Plan

Printed out data in console to ensure that user id of user submitting review is saved in data. Can see in the console that unique userId has been saved.

(Frontend testing)

(Backend testing)

Can see that userId is saved in firebase with the reviews that I submitted for testing

Notes

Breaking Changes

• Database schema change (anything that changes Firestore collection structure)
• Other change that could cause problems (Detailed in notes)

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1 out of 2 committers have signed the CLA.

✅ jesshan700
❌ jesshan70
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[diff-counting] Significant lines: 5.

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Visit the preview URL for this PR (updated for commit 629d190):

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[thuypham03]

The commit looks clear and is able to add a new attribute (userId). This is the first step that helps retrieve users' reviews in profile page. Good job with testing thoroughly in both frontend and database log.