added findOneBy method in user service

src/routes/user/user.service.ts

@@ -47,6 +47,10 @@ export class UserService {
         return this.usersRepository.find();
     }
 
+    async findOneBy(where: Partial<Users>) {
+        return this.usersRepository.findOne( { where } )
+    }
+
     //Trouver utilisateur par ID
     async findOne(id: string): Promise<Users> {
         const user = await this.usersRepository.findOne({ where: { id } });