feat: complete registration invitation and auth redesign

server/db/common/test_data/test_data.go

@@ -30,6 +30,7 @@ func initUsers(now time.Time) []*types.User {
 			Id: "3ysxkod5hNM",
 		},
 		UserAgent: "SomeAgent v1.2.3",
+		Username:  "alice",
 		Tags:      []string{"alice"},
 	})
 	users = append(users, &types.User{
@@ -37,6 +38,7 @@ func initUsers(now time.Time) []*types.User {
 			Id: "9AVDamaNCRY",
 		},
 		UserAgent: "Tinode Web v111.222.333",
+		Username:  "bob",
 		Tags:      []string{"bob"},
 	})
 	users = append(users, &types.User{
@@ -44,6 +46,7 @@ func initUsers(now time.Time) []*types.User {
 			Id: "0QLrX3WPS2o",
 		},
 		UserAgent: "Tindroid v1.2.3",
+		Username:  "carol",
 		Tags:      []string{"carol"},
 	})
 	for _, user := range users {