140export const signIn = async (email: string, password: string, ip: string): Promise<AuthToken> => {
141    // get, check and increase signin attempt
142    const signinAttemptsCacheKey = AUTH_CACHE_KEYS.SIGNIN_ATTEMPT(ip);
143    let signinAttempts = Number(await getCache(signinAttemptsCacheKey)) | 0;
144
145    if (signinAttempts >= MAX_SIGNIN_ATTEMPT) {
146        return tooManyAttemptHandler({ cacheKey: signinAttemptsCacheKey, message: "Too many sign-in requests detected." });
147    }
148
149    signinAttempts++;
150    await setCache(signinAttemptsCacheKey, signinAttempts, { PX: 6 * 60 * 60 * 1000 });
151
152    // get and check email signin attempt 
153    const emailSigninAttemptsCacheKey = AUTH_CACHE_KEYS.EMAIL_SIGNIN_ATTEMPT(email, ip);
154    let attempt = Number(await getCache(emailSigninAttemptsCacheKey) || 0);
155
156    if (attempt >= MAX_EMAIL_SIGNIN_ATTEMPT) {
157        return tooManyAttemptHandler({ cacheKey: emailSigninAttemptsCacheKey, message: "Too many sign-in attempts for this account." });
158    }
159