Sprint 10 feature (English)

Data Center: Add 3 report metrics

To provide better data experience, we add more metrics in Data Center.

1. CSAT score：Latest score of conversation, from 1 to 5, assessed by Customer
2. CSAT timestamp：Latest timestamp of giving CSAT score
3. Assign timestamp：Time when this assignee was assigned to

Seen / Unseen status on Agent side

Agents can know if players already read the message or not based on Seen/Unseen status.

Custom Authentication v2.0

For players already login the website, when they start a new conversation, system would integrate with DI to show player information in HelpDesk