PROBLEM
As nice as it is to use our webshell, sometimes its helpful to connect directly to our machine. To do so, please add your own public key to ~/.ssh/authorized_keys, using the webshell. The flag is in the ssh banner which will be displayed when you login remotely with ssh to with your username.
HINT
key generation tutorial We also have an expert demonstrator to help you along. link
SOLUTION
Just watch the video given in the HINT and you'll be good to go.
FLAG - picoCTF{who_n33ds_p4ssw0rds_38dj21}