[Task] Implement /users/{user_id}/tasks as Lambda Function

[Kemet2016]

Is your feature request related to a problem? Please describe. Implement /users/{user_id}/tasks as Lambda Function

Describe the solution you'd like

• I created the Lambda function to create the endpoints of the Users/UserId/tasks which implements the Get, Post, Update, and Delete functions.
• Deploy the function to AWS and test it to see if everything is working properly.