Add code to send email to the team captain when a user requests to join a team.
Add code to send email to the team captain when a user requests to join a team.

mitre-cyber-academy/ctf-scoreboard,mitre-cyber-academy/registration-app,mitre-cyber-academy/ctf-scoreboard,mitre-cyber-academy/ctf-scoreboard,mitre-cyber-academy/registration-app,mitre-cyber-academy/registration-app,mitre-cyber-academy/ctf-scoreboard