from typing import List


def set_user(conn, phone_number: str, options: List[str], t: str) -> None:
    """
    Set user info in db.
    """
    with conn.cursor() as cur:

        # Get user info from db.
        cur.execute("UPSERT INTO users (phone_number, options, t) VALUES (%s, %s, %s)", (phone_number, options, t))
    conn.commit()
    return None