feat: add ApiService for login functionality

agrilinkvocpro/app/src/main/java/com/syaroful/agrilinkvocpro/data/network/ApiService.kt

@@ -0,0 +1,21 @@
+package com.syaroful.agrilinkvocpro.data.network
+
+import com.syaroful.agrilinkvocpro.data.model.LoginResponse
+import retrofit2.Response
+import retrofit2.http.Body
+import retrofit2.http.Header
+import retrofit2.http.POST
+
+
+data class LoginRequest(
+    val username: String,
+    val password: String
+)
+
+interface ApiService {
+    @POST("auth/login")
+    suspend fun login(
+        @Header("Authorization") authHeader: String,
+        @Body body: LoginRequest
+    ): Response<LoginResponse>
+}