Detect repeated failed logins

Challenge

Implement int max_failed_attempts(const char *auth_log, const char *username) returning the longest consecutive run of failed login attempts for the given username in the supplied auth log.

Lines look like <date> sshd[N]: Failed password for <user> from <ip> (failure) or Accepted password for <user> (success). A successful login resets the streak.

Starter code

#include <stdio.h>
#include <string.h>

int max_failed_attempts(const char *auth_log, const char *username) {
    /* TODO */
    return 0;
}