In this assignment, you are tasked with creating a basic program that performs input validation using a while loop. Your program will prompt the user to enter their age, and the input must meet specific criteria to be considered valid. The program will keep asking the user for input until a valid entry is provided.

Input Validation Requirements:

The input must be a positive integer between $0$ and $120.$

If the user enters a negative number, the program should inform the user that the age must be positive.

If the user enters a non$-$numeric value $($such as letters or symbols$),$ the program should inform the user that the input must be a valid number.

The program should use a while loop to repeatedly ask for input until the user enters a valid age.

Your program should produce an output similar to the following sample run:

Sample Run

Please enter your age: $-5$

Invalid input! Age must be between $0$ and $120.$

Please enter your age: abc

Invalid input! Please enter a valid number.

Please enter your age: $130$

Invalid input! Age must be between $0$ and $120.$

Please enter your age: $25$

Thank you! You entered a valid age: $25$

Note: Assuming that the user's input has been stored in the variable user$\_$input, use the user$\_$input.isdigit$()$ method to check if it consists only of digits.