diff --git a/src/modules/userRole/controller/UserRoleAssignment.controller.ts b/src/modules/userRole/controller/UserRoleAssignment.controller.ts
index b1ce329..3d68a79 100644
--- a/src/modules/userRole/controller/UserRoleAssignment.controller.ts
+++ b/src/modules/userRole/controller/UserRoleAssignment.controller.ts
@@ -1,16 +1,39 @@
 import { Context } from "elysia";
-import { UserRoleAssignmentSchema } from "../schemas/UserRoleAssignment.schema";
-import { returnErrorResponse } from "../../../helpers/callback/httpResponse";
+import { userRoleAssignmentSchema } from "../schemas/userRoleAssignment.schema";
+import { mainErrorHandler } from "../../../helpers/error/handler";
+import { userRoleAssignmentService } from "../services/userRoleAssignment.service";
+import {
+  returnErrorResponse,
+  returnWriteResponse,
+} from "../../../helpers/callback/httpResponse";
 
-export const UserRoleAssignmentController = async (ctx: Context) => {
-  const validation = UserRoleAssignmentSchema.safeParse(ctx.body);
-  //   if (!validation.success)
-  //     return returnErrorResponse(
-  //       ctx.set,
-  //       400,
-  //       "Validation error",
-  //       validation.error
-  //     );
+export const userRoleAssignmentController = async (ctx: Context) => {
+  // Validate form input using zod schema
+  const validation = userRoleAssignmentSchema.safeParse(ctx.body);
+  if (!validation.success)
+    return returnErrorResponse(
+      ctx.set,
+      400,
+      "Validation error",
+      validation.error
+    );
 
-  return ctx.body;
+  try {
+    // Store the userId and roleId from the validated data
+    const payload = {
+      userId: validation.data.userId,
+      roleId: validation.data.roleId,
+    };
+
+    // Call the service to assign the user role
+    const AssignUserRole = await userRoleAssignmentService(payload);
+    return returnWriteResponse(
+      ctx.set,
+      201,
+      "User role assignment successfully",
+      AssignUserRole
+    );
+  } catch (error) {
+    return mainErrorHandler(ctx.set, error);
+  }
 };
diff --git a/src/modules/userRole/index.ts b/src/modules/userRole/index.ts
index 10bc856..5da84e5 100644
--- a/src/modules/userRole/index.ts
+++ b/src/modules/userRole/index.ts
@@ -1,11 +1,11 @@
 import Elysia from "elysia";
 import { createUserRoleController } from "./controller/createUserRole.controller";
 import { unautenticatedMiddleware } from "../../middleware/auth/unauthenticated.middleware";
-import { UserRoleAssignmentController } from "./controller/UserRoleAssignment.controller";
+import { userRoleAssignmentController } from "./controller/userRoleAssignment.controller";
 
 export const userRoleModule = new Elysia({ prefix: "/roles" })
   .get("/", () => "Hello User Role Module", {
     beforeHandle: unautenticatedMiddleware,
   })
   .post("/", createUserRoleController)
-  .post("/assign", UserRoleAssignmentController); // need fix and it just for development only!
+  .post("/assign", userRoleAssignmentController); // need fix and it just for development only!
diff --git a/src/modules/userRole/repositories/userRoleAssignment.repository.ts b/src/modules/userRole/repositories/userRoleAssignment.repository.ts
new file mode 100644
index 0000000..6f3203d
--- /dev/null
+++ b/src/modules/userRole/repositories/userRoleAssignment.repository.ts
@@ -0,0 +1,22 @@
+import { userModel } from "../../user/user.model";
+import { UserRoleAssignment } from "../userRole.types";
+
+export const userRoleAssignmentRepository = async ({
+  userId,
+  roleId,
+}: UserRoleAssignment) => {
+  const userAssigned = await userModel.update({
+    where: {
+      id: userId,
+    },
+    data: {
+      roles: {
+        connect: {
+          id: roleId,
+        },
+      },
+    },
+  });
+
+  return userAssigned;
+};
diff --git a/src/modules/userRole/schemas/UserRoleAssignment.schema.ts b/src/modules/userRole/schemas/UserRoleAssignment.schema.ts
index d2996ef..5f4e782 100644
--- a/src/modules/userRole/schemas/UserRoleAssignment.schema.ts
+++ b/src/modules/userRole/schemas/UserRoleAssignment.schema.ts
@@ -1,6 +1,6 @@
 import z from "zod";
 
-export const UserRoleAssignmentSchema = z.object({
+export const userRoleAssignmentSchema = z.object({
   userId: z.string(),
   roleId: z.string(),
 });
diff --git a/src/modules/userRole/services/userRoleAssignment.service.ts b/src/modules/userRole/services/userRoleAssignment.service.ts
new file mode 100644
index 0000000..d165611
--- /dev/null
+++ b/src/modules/userRole/services/userRoleAssignment.service.ts
@@ -0,0 +1,18 @@
+import { ErrorForwarder } from "../../../helpers/error/instances/forwarder";
+import { userRoleAssignmentRepository } from "../repositories/userRoleAssignment.repository";
+import { UserRoleAssignment } from "../userRole.types";
+
+export const userRoleAssignmentService = async ({
+  userId,
+  roleId,
+}: UserRoleAssignment) => {
+  try {
+    const assignRoleToUser = await userRoleAssignmentRepository({
+      userId,
+      roleId,
+    });
+    return assignRoleToUser;
+  } catch (error) {
+    ErrorForwarder(error);
+  }
+};
diff --git a/src/modules/userRole/userRole.types.ts b/src/modules/userRole/userRole.types.ts
index e69de29..ef10ce3 100644
--- a/src/modules/userRole/userRole.types.ts
+++ b/src/modules/userRole/userRole.types.ts
@@ -0,0 +1,4 @@
+export interface UserRoleAssignment {
+  userId: string;
+  roleId: string;
+}