Hello devs, Setting the high-security login method was a tough task in SteemPro. Today I completed the authentication logic. The hurdle was to get the login username during the server-side rendering. I did some research and decided to implement the Next Auth with a custom credentials login. ![image.png](https://cdn.steemitimages.com/DQmdV2tPLVknLDwP7XN3WxYL628V8Umnbvt3CgA2nJmw9zh/image.png) Only the sign-in option is required. So I add to login to Next Auth only with the username. Encrypted Private was not added to the auth as it's sensitive information even if it is encrypted. So I decided to keep the encrypted private key to local storage and use the Next auth login session to get the username on the server-side rendering. Server-side rendering is used in NextJs to set the metadata and also to improve the overall performance of the app. Today I also covered the error boundary and loading states. here is the simple implementation of the Next Auth.

import NextAuth from "next-auth";
import CredentialsProvider from "next-auth/providers/credentials"
const handler = NextAuth({
    session: {
        strategy: 'jwt',
    },
    providers: [
        CredentialsProvider({
            name: 'SteemPro Authenticator',
            credentials: {
                username: {},
            },
            async authorize(credentials, req) {
                if (credentials) {
                    return {
                        id: credentials.username,
                        name: credentials.username,
                    };
                }
                return null
            }
        })
    ],
});
export { handler as GET, handler as POST };

- Download SteemPro Mobile https://play.google.com/store/apps/details?id=com.steempro.mobile - Visit here. https://www.steempro.com - SteemPro Discord [Official Discord Server](https://discord.gg/Bsf98vMg6U)

Cc: @blacks Cc: @rme Cc: @hungry-griffin Cc: @steemchiller Cc: @steemcurator01 Cc: @pennsif Cc: @future.witness Cc: @stephenkendal Cc: @justyy Cc: @upvu Cc: @h4lab **[VOTE](https://steemitwallet.com/~witnesses) @faisalamin as witness**

🇸‌🇹‌🇪‌🇪‌🇲‌🇵‌🇷‌🇴‌