Termination - Password sharing

Infraction: My position - Team Leader
I am mentoring an employee that is directly reporting to me. I shared my password to the employee. Shared by doing things that are I should be authorized to do.

The Company: According to the handbook
"Consenting to,tolerating, or allowing another employee to use his/her password to which the accessing employee has not been authorized"

Reasons for sharing the password:

1. Mentoring the employee to be a leader
2. Common practice of Team Leaders to share their access to employees ( have evidence to prove)
3. Direct instructions from Managers to create a Point of Contact person in the team to mold the person to a higher position.

Question: If after the administrative hearing set by the company and their recommendation is termination, will this be considered as illegal termination?
Can I file it to NLRC?

in my opinion, if there was no perverse attitude behind the act, it should not be basis for termination.

Thank you for your reply, so will that fall under illegal termination if they will serve me a termination paper? Even if in the handbook it states that its a terminable offense. And, yes there is no perverse attitude behind the act because the purpose is to train the agent to a higher position.