French phrase
Mon identifiant est ~.
Meaning
My user ID is ___.
When to use it
This states a user's service ID. It suits support requests, login checks, and other polite or routine exchanges.
Example dialogue
Quel est votre identifiant, s'il vous plaît ?
What is your user ID, please?
Mon identifiant est 987654.
My user ID is 987654.