MM-42268: We add more fields to Channel and Team (#19675)

Also added sessions as part of the user object

https://mattermost.atlassian.net/browse/MM-42268

```release-note
NONE
```

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

model/session.go

@@ -218,3 +218,11 @@ func (s *Session) GetCSRF() string {
 
 	return s.Props["csrf"]
 }
+
+func (s *Session) CreateAt_() float64 {
+	return float64(s.CreateAt)
+}
+
+func (s *Session) ExpiresAt_() float64 {
+	return float64(s.ExpiresAt)
+}