Testing via Postman
#Output
Item added Successfully
If the user enters an existing item name, it shows: "Item already exists."
Giving a non-existing ID while updating results in: 'Item does not exist'.
Item Updated Successfully
If users skip any fields, display specific error messages for each entity field. For example, if the user skips the item name, it should display: "Name is required."
Item Deleted Successfully
Entering incorrect API Address
Searching Item by name
