diff --git a/src/server/models/User.ts b/src/server/models/User.ts
index f3d5663..754b5f8 100644
--- a/src/server/models/User.ts
+++ b/src/server/models/User.ts
@@ -3,7 +3,8 @@ import mongoose, { Schema, Document } from 'mongoose';
 export type UserRole = 'guest' | 'user' | 'admin';
 
 export interface IUser extends Document {
-    clerkId: string;
+    clerkId?: string;
+    logtoId?: string;
     email: string;
     name: string;
     role: UserRole;
@@ -17,8 +18,16 @@ export interface IUser extends Document {
 const UserSchema: Schema = new Schema({
     clerkId: {
         type: String,
-        required: true,
+        required: false,
         unique: true,
+        sparse: true,
+        index: true
+    },
+    logtoId: {
+        type: String,
+        required: false,
+        unique: true,
+        sparse: true,
         index: true
     },
     organizationId: {
@@ -27,7 +36,8 @@ const UserSchema: Schema = new Schema({
     },
     email: {
         type: String,
-        required: true
+        required: true,
+        unique: true
     },
     name: {
         type: String,