IsNotEmpty checks if a string is empty after trimming.

IsInRange checks if a number is within a specific range.

IsNotEmpty checks if a string is not empty after trimming.

IsStringLength checks if a string length is within the given range.

IsValidEmail validates email format using a regex.

Validates LoginInput.

Validates the product input for create operation.

Validates the product input for update operation.

Validates the user input for create operation.

Validates the user input for update operation.