What is the ruling of Islamic law on forums requesting their female members to change their pseudonyms to their real names?

It is permissible for a Muslim woman to register with her real name, her kunya (agnomen), or her title, as long as she does not fear harm. Indeed, the female Companions were known by their names and kunyas. However, if she fears harm, she should not disclose her real name, as this is more concealing and safer for her, based on the Prophet, peace and blessings be upon him, who said: "Leave that which makes you doubt for that which does not make you doubt."