diff --git a/src/use_cases/create_user.py b/src/use_cases/create_user.py
index ea7ee47..df94ee9 100644
--- a/src/use_cases/create_user.py
+++ b/src/use_cases/create_user.py
@@ -2,18 +2,31 @@
 from typing import Optional
 
 #dependency imports
-#TODO: A1: Use correct dependencies
+from entities.user import User
+from use_cases.user_repository import IUserRepository
 
-#TODO: A2: Create InputPort
+class ICreateUserInputPort:
+    def execute(self, user_name:str, user_email:str, user_password:str):
+        """
+        Abstract method to execute use case.
+        """
+        raise NotImplementedError("execute must be implemented by a subclass")
+    
+class ICreateUserOutputPort:
+    def present(self, user:User):
+        """
+        Abstract method to execute use case.
+        """
+        raise NotImplementedError("execute must be implemented by a subclass")
 
-#TODO: A3: Create OutputPort
+class CreateUser(ICreateUserInputPort):
+    def __init__(self, user_repository: IUserRepository, output_port: ICreateUserOutputPort):
+        self.user_repository = user_repository
+        self.output_port = output_port
 
-#TODO: A5: Use Case CreateUser:
-class CreateUser:
-    def __init__(self):
-        pass
-        #TODO: Initialize required Interfaces
-
-    def execute(self):
-        pass
-        #TODO: Implement Use Case
\ No newline at end of file
+    def execute(self, user_name:str, user_email:str, user_password:str):
+        """
+        Creates a User.
+        """
+        user = self.user_repository.create_user(user_name, user_email, user_password)
+        self.output_port.present(user)
\ No newline at end of file
diff --git a/src/use_cases/user_repository.py b/src/use_cases/user_repository.py
index d566b8e..b305f67 100644
--- a/src/use_cases/user_repository.py
+++ b/src/use_cases/user_repository.py
@@ -1,5 +1,11 @@
-from typing import Optional, List
+from typing import Optional
+
+#dependency imports
+from entities.user import User
 
 class IUserRepository:
-    pass
-    #TODO: A4: Define interface functions for creating a user
\ No newline at end of file
+    def create_user(self, user_name: str, user_email: str, user_password: str) -> Optional[User]:
+        """
+        Abstract method to fetch product data by ID.
+        """
+        raise NotImplementedError("get_product_by_id must be implemented by a subclass")
\ No newline at end of file