diff --git a/lib/services/email-service.ts b/lib/services/email-service.ts
index 3c4ee522..1dcfbbc3 100644
--- a/lib/services/email-service.ts
+++ b/lib/services/email-service.ts
@@ -18,6 +18,7 @@ import {
   invalidateEmailContentCache
 } from '@/lib/redis';
 import { EmailCredentials, EmailMessage, EmailAddress, EmailAttachment } from '@/lib/types';
+import { PrismaClient } from '@prisma/client';
 
 // Types specific to this service
 export interface EmailListResult {
@@ -150,7 +151,7 @@ export async function getImapConnection(userId: string): Promise<ImapFlow> {
  * Get user's email credentials from database
  */
 export async function getUserEmailCredentials(userId: string): Promise<EmailCredentials | null> {
-  const credentials = await prisma.mailCredentials.findUnique({
+  const credentials = await prisma.mailCredentials.findFirst({
     where: { userId },
     select: {
       id: true,
@@ -169,14 +170,14 @@ export async function getUserEmailCredentials(userId: string): Promise<EmailCred
       updatedAt: true
     }
   });
-  
+
   if (!credentials) {
     return null;
   }
-  
+
   // Cache the credentials
   await cacheEmailCredentials(userId, credentials);
-  
+
   return credentials;
 }