Function set_user_note 

pub async fn set_user_note(
    user_id: i64,
    note: FormattedText,
    client_id: i32,
) -> Result<(), Error>

Changes a note of a contact user

Arguments

• user_id - User identifier
• note - Note to set for the user; 0-getOption(“user_note_text_length_max”) characters. Only Bold, Italic, Underline, Strikethrough, Spoiler, and CustomEmoji entities are allowed
• client_id - The client id to send the request to