Fallback to empty User instead of crashing if the fetched User is not in DB

[VelikovPetar]

🎯 Goal

Instead of crashing when we try to fetch a User that is not yet inserted into the DB, return an empty User (User(id = userId)). Note: This just covers the case where a User is transitively fetched by related operations (ex. selectMessage, selectChannel), the regular repository.selectUser() is not affected.

🛠 Implementation details

• remove requireNotNull and instead fallback to empty User

🎨 UI Changes

NA

🧪 Testing

Not really reproducible on the Sample app, however it was reported by a customer who use the Repository independently from the UI SDK.

[github-actions]

SDK Size Comparison 📏

SDK	Before	After	Difference	Status
stream-chat-android-client	3.23 MB	3.23 MB	0.00 MB	🟢
stream-chat-android-offline	3.45 MB	3.45 MB	0.00 MB	🟢
stream-chat-android-ui-components	10.54 MB	10.54 MB	0.00 MB	🟢
stream-chat-android-compose	12.76 MB	12.76 MB	0.00 MB	🟢

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud