input: Write a function to retrieve user data and return it as a list of dictionaries.
  assert get_users() == [{'Id': 1, 'Name': 'Alice', 'Email': 'alice@example.com', 'Gender': 'Female'}, {'Id': 2, 'Name': 'Bob', 'Email': 'bob@example.com', 'Gender': 'Male'}]
  assert get_users() == []
  assert get_users() == [{'Id': 3, 'Name': 'Charlie', 'Email': 'charlie@example.com', 'Gender': 'Non-binary'}]
output: def get_users():
      # Mock data for testing
      user_data = [
          {'Id': 1, 'Name': 'Alice', 'Email': 'alice@example.com', 'Gender': 'Female'},
          {'Id': 2, 'Name': 'Bob', 'Email': 'bob@example.com', 'Gender': 'Male'},
          {'Id': 3, 'Name': 'Charlie', 'Email': 'charlie@example.com', 'Gender': 'Non-binary'}
      ]
      
      # Simulated retrieval of user data
      return user_data