Username-Validator-

The program takes in a Username string and follow the 4 basic rules for creating a username. The user has to enter the username The 4 rules are :

1. The username must be <= 25 letters
2. The username must have only letter, digits and underscores
3. The username must not end on "_"
4. The first letter of the username must be a letter

After passing the username through the 4 arguments, If the username Follows all the rules, the program returns True & If it doesnt, The program returns False.

#Example:

A) Input:

MichaelBJordan97

Output:

True

B) Input:

1122John

Output:

False

C) Input:

Andrew@Tate

Output:

False

D) Input:

Lonely_Developer_

Output:

False