Write a Sql query to retrieve the usernames of the users who have tweeted on Twitter, ordered by the earliest tweet creation time, and limited to the first five users?

Tables Schema as Below:

USERS

columnName dataType

id INT AUTO INCREMENT

username VARCHAR$(50)$ unique

email VARCHAR$(50)$ unique

remember$\_$token VARCHAR$(50)$

created$\_$at DATETIME

updated$\_$at DATETIME

password$\_$digest VARCHAR$(50)$

primary key $($id$)$

TWEETS

columnName dataType

id INT

content VARCHAR$(50)$

created$\_$at DATE

updated$\_$at DATE

primary key $($id$)$

UserTweetRelation

columnName dataType

id INT

created$\_$at DATE

retweet VARCHAR$(50)$

user$\_$id INT

tweet$\_$id INT

primary key $($id$)$

Input