create use cases for auth

src/modules/auth/infrastructure/auth.repository.ts

@@ -0,0 +1,18 @@
+import { Injectable } from '@nestjs/common'
+import { PrismaService } from '../../../prisma.service'
+
+@Injectable()
+export class AuthRepository {
+  constructor(private prisma: PrismaService) {}
+
+  async createRefreshToken(userId: string, token: string, expiresAt: Date) {
+    return await this.prisma.refreshToken.create({
+      data: {
+        userId,
+        token,
+        expiresAt,
+        isRevoked: false,
+      },
+    })
+  }
+}