writer.WriteString("groupId", "default");

                        writer.WriteString("groupName", "default");

TEAMModelOS.SDK/Models/Cosmos/School/SchoolTeacher.cs

@@ -15,5 +15,7 @@ namespace TEAMModelOS.SDK.Models
         public List<string> permissions { get; set; }
         public string status { get; set; }
         public long createTime { get; set; }
+        public string groupId { get; set; }
+        public string groupName { get; set; }
     }
 }

TEAMModelOS/Controllers/School/SchoolTeacherController.cs

@@ -264,7 +264,9 @@ namespace TEAMModelOS.Controllers
                         writer.WriteString("id", id.ToString());
                         writer.WriteString("name", name.ToString());
                         writer.WriteString("picture", picture.ToString());
-                        writer.WriteNumber("size", 1);
+                        writer.WriteNumber("size", 1); 
+                        writer.WriteString("groupId", "default");
+                        writer.WriteString("groupName", "default");
                         writer.WriteNull("defaultSchool");
                         writer.WriteStartArray("schools");
                         writer.WriteStartObject();
@@ -297,6 +299,8 @@ namespace TEAMModelOS.Controllers
                         writer.WriteString("code", $"Teacher-{school_code}");
                         writer.WriteString("id", id.ToString());
                         writer.WriteString("name", name.ToString());
+                        writer.WriteString("groupId", "default");
+                        writer.WriteString("groupName", "default");
                         writer.WriteString("picture", picture.ToString());
                         writer.WriteNull("job");
                         writer.WriteStartArray("roles");