sa, jwtClaims, err := sys.getAccountWithClaims(ctx, accessKey)
	if err != nil {
		if err == errNoSuchAccount {
			return UserIdentity{}, nil, errNoSuchServiceAccount
		}
		return UserIdentity{}, nil, err
	}
	if !sa.Credentials.IsServiceAccount() {
		return UserIdentity{}, nil, errNoSuchServiceAccount
	}