in src/main/java/com/spotify/github/v3/clients/JwtTokenIssuer.java [70:79]
public String getToken(final Integer appId) {
return Jwts.builder()
.setId("github-auth")
.setSubject("authenticating via private key")
.setIssuer(String.valueOf(appId))
.signWith(signingKey, SIGNATURE_ALGORITHM)
.setExpiration(new Date(System.currentTimeMillis() + TOKEN_TTL))
.setIssuedAt(new Date())
.compact();
}