feat: add Twitter social login support by updating the auth service and user schema.

prisma/schema.prisma

@@ -30,6 +30,7 @@ enum AuthProvider {
   LOCAL
   GOOGLE
   FACEBOOK
+  TWITTER
 }
 
 // ===========================================
@@ -49,6 +50,7 @@ model User {
   authProvider      AuthProvider @default(LOCAL)
   googleId          String?      @unique
   facebookId        String?      @unique
+  twitterId         String?      @unique
 
   // Timestamps
   createdAt         DateTime     @default(now())

src/auth/auth.service.ts

@@ -185,7 +185,11 @@ export class AuthService {
   // ==========================================
   async socialAuth(dto: SocialAuthDto) {
     const providerIdField =
-      dto.provider === 'google' ? 'googleId' : 'facebookId';
+      dto.provider === 'google'
+        ? 'googleId'
+        : dto.provider === 'facebook'
+          ? 'facebookId'
+          : 'twitterId';
 
     // Check if user exists with this provider ID
     let user = await this.prisma.user.findFirst({
@@ -218,7 +222,9 @@ export class AuthService {
         const authProvider =
           dto.provider === 'google'
             ? AuthProvider.GOOGLE
-            : AuthProvider.FACEBOOK;
+            : dto.provider === 'facebook'
+              ? AuthProvider.FACEBOOK
+              : AuthProvider.TWITTER;
 
         // Parse name
         const nameParts = dto.name?.split(' ') || [];