Add email field and add it to register logic

src/repositories/userRepository.ts

@@ -27,6 +27,19 @@ class UserRepository {
       throw new Error(`Failed to get user by username: ${error.message}`)
     }
   }
+
+  async getByEmail(email: string): Promise<User | null> {
+    try {
+      return await prisma.user.findUnique({
+        where: {
+          email
+        }
+      })
+    } catch (error: any) {
+      // Handle error
+      throw new Error(`Failed to get user by email: ${error.message}`)
+    }
+  }
 }
 
 export default new UserRepository()